diff --git a/dist/components/cmd_bar/03_peak.js b/dist/components/cmd_bar/03_peak.js
index 9b52924e..baa9d3a9 100644
--- a/dist/components/cmd_bar/03_peak.js
+++ b/dist/components/cmd_bar/03_peak.js
@@ -135,7 +135,7 @@ const mapStateToProps = (state, props) => (
   cyclicVotaSt: state.cyclicvolta,
   curveSt: state.curve,
   editPeakSt: state.editPeak.present,
-  thresSt: state.threshold,
+  thresSt: state.threshold.list[state.curve.curveIdx],
   layoutSt: state.layout,
   shiftSt: state.shift
 });
diff --git a/dist/components/cmd_bar/r03_threshold.js b/dist/components/cmd_bar/r03_threshold.js
index cc5f6835..294c33c5 100644
--- a/dist/components/cmd_bar/r03_threshold.js
+++ b/dist/components/cmd_bar/r03_threshold.js
@@ -32,12 +32,24 @@ const txtPercent = () => /*#__PURE__*/_react.default.createElement(_material.Inp
 }, /*#__PURE__*/_react.default.createElement("span", {
   className: "txt-percent"
 }, "%"));
-const setThreshold = (classes, thresVal, updateThresholdValueAct) => {
-  const onBlur = e => updateThresholdValueAct(e.target.value);
-  const onChange = e => updateThresholdValueAct(e.target.value);
+const setThreshold = (classes, thresVal, updateThresholdValueAct, curveSt) => {
+  const {
+    curveIdx
+  } = curveSt;
+  const onBlur = e => updateThresholdValueAct({
+    value: e.target.value,
+    curveIdx
+  });
+  const onChange = e => updateThresholdValueAct({
+    value: e.target.value,
+    curveIdx
+  });
   const onEnterPress = e => {
     if (e.key === 'Enter') {
-      updateThresholdValueAct(e.target.value);
+      updateThresholdValueAct({
+        value: e.target.value,
+        curveIdx
+      });
     }
   };
   return /*#__PURE__*/_react.default.createElement(_material.FormControl, {
@@ -78,6 +90,7 @@ const Threshold = _ref => {
     hideThresSt,
     thresValSt,
     isEditSt,
+    curveSt,
     updateThresholdValueAct,
     resetThresholdValueAct,
     toggleThresholdIsEditAct
@@ -85,7 +98,7 @@ const Threshold = _ref => {
   const thresVal = thresValSt || feature.thresRef;
   return /*#__PURE__*/_react.default.createElement("span", {
     className: classes.groupRight
-  }, setThreshold(classes, thresVal, updateThresholdValueAct), /*#__PURE__*/_react.default.createElement(_material.Tooltip, {
+  }, setThreshold(classes, thresVal, updateThresholdValueAct, curveSt), /*#__PURE__*/_react.default.createElement(_material.Tooltip, {
     title: /*#__PURE__*/_react.default.createElement("span", {
       className: "txt-sv-tp"
     }, "Restore Threshold")
@@ -109,8 +122,9 @@ const mapStateToProps = (state, props) => (
 // eslint-disable-line
 {
   hideThresSt: _cfg.default.hideCmdThres(state.layout),
-  isEditSt: state.threshold.isEdit,
-  thresValSt: parseFloat(state.threshold.value) || 0
+  isEditSt: state.threshold.list[state.curve.curveIdx].isEdit,
+  thresValSt: parseFloat(state.threshold.list[state.curve.curveIdx].value) || 0,
+  curveSt: state.curve
 });
 const mapDispatchToProps = dispatch => (0, _redux.bindActionCreators)({
   updateThresholdValueAct: _threshold.updateThresholdValue,
@@ -124,6 +138,7 @@ Threshold.propTypes = {
   hideThresSt: _propTypes.default.bool.isRequired,
   isEditSt: _propTypes.default.bool.isRequired,
   thresValSt: _propTypes.default.number.isRequired,
+  curveSt: _propTypes.default.object.isRequired,
   updateThresholdValueAct: _propTypes.default.func.isRequired,
   resetThresholdValueAct: _propTypes.default.func.isRequired,
   toggleThresholdIsEditAct: _propTypes.default.func.isRequired
diff --git a/dist/components/cmd_bar/r05_submit_btn.js b/dist/components/cmd_bar/r05_submit_btn.js
index 769e5cce..c6e1cf4c 100644
--- a/dist/components/cmd_bar/r05_submit_btn.js
+++ b/dist/components/cmd_bar/r05_submit_btn.js
@@ -93,7 +93,7 @@ const mapStateToProps = (state, props) => (
 // eslint-disable-line
 {
   editPeakSt: state.editPeak.present,
-  thresSt: state.threshold,
+  thresSt: state.threshold.list[state.curve.curveIdx],
   layoutSt: state.layout,
   shiftSt: state.shift,
   scanSt: state.scan,
diff --git a/dist/components/cmd_bar/r06_predict_btn.js b/dist/components/cmd_bar/r06_predict_btn.js
index c0b3c877..0040036d 100644
--- a/dist/components/cmd_bar/r06_predict_btn.js
+++ b/dist/components/cmd_bar/r06_predict_btn.js
@@ -194,7 +194,7 @@ const mapStateToProps = (state, props) => (
   editPeakSt: state.editPeak.present,
   scanSt: state.scan,
   shiftSt: state.shift,
-  thresSt: state.threshold,
+  thresSt: state.threshold.list[state.curve.curveIdx],
   integrationSt: state.integration.present,
   multiplicitySt: state.multiplicity.present,
   curveSt: state.curve
diff --git a/dist/helpers/chem.js b/dist/helpers/chem.js
index 2910ad2e..bf7cc1cd 100644
--- a/dist/helpers/chem.js
+++ b/dist/helpers/chem.js
@@ -164,7 +164,7 @@ const convertFrequency = (layout, feature) => {
   return parseFloat(freq) || false;
 };
 const ToFrequency = exports.ToFrequency = (0, _reselect.createSelector)(getLayout, getFeature, convertFrequency);
-const getThreshold = state => state.threshold ? state.threshold.value * 1.0 : false;
+const getThreshold = state => state.threshold ? state.threshold.list[state.curve.curveIdx].value * 1.0 : false;
 const Convert2Peak = function (feature, threshold, offset) {
   let upThreshold = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
   let lowThreshold = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : false;
diff --git a/dist/layer_prism.js b/dist/layer_prism.js
index d393887f..12bc2af0 100644
--- a/dist/layer_prism.js
+++ b/dist/layer_prism.js
@@ -113,7 +113,7 @@ const mapStateToProps = (state, props) => (
 // eslint-disable-line
 {
   scanSt: state.scan,
-  thresSt: state.threshold,
+  thresSt: state.threshold.list[state.curve.curveIdx],
   uiSt: state.ui
 });
 const mapDispatchToProps = dispatch => (0, _redux.bindActionCreators)({}, dispatch);
diff --git a/dist/reducers/reducer_threshold.js b/dist/reducers/reducer_threshold.js
index a748e146..4ed4122a 100644
--- a/dist/reducers/reducer_threshold.js
+++ b/dist/reducers/reducer_threshold.js
@@ -8,43 +8,202 @@ var _action_type = require("../constants/action_type");
 /* eslint-disable prefer-object-spread, default-param-last */
 
 const initialState = {
-  isEdit: true,
-  value: false,
-  upper: false,
-  lower: false
+  selectedIdx: 0,
+  list: [{
+    isEdit: true,
+    value: false,
+    upper: false,
+    lower: false
+  }]
+};
+
+// const defaultThresHold = {
+//   isEdit: true,
+//   value: false,
+//   upper: false,
+//   lower: false,
+// };
+
+const setThresHoldValue = (state, action) => {
+  const {
+    payload
+  } = action;
+  const {
+    list,
+    selectedIdx
+  } = state;
+  if (payload) {
+    const {
+      value,
+      curveIdx
+    } = payload;
+    const selectedThres = list[curveIdx];
+    const newSelectedThres = Object.assign({}, selectedThres, {
+      value
+    });
+    const newListThres = [...list];
+    newListThres[curveIdx] = newSelectedThres;
+    return Object.assign({}, state, {
+      list: newListThres,
+      selectedIdx: curveIdx
+    });
+  }
+  const selectedThres = list[selectedIdx];
+  const newSelectedThres = Object.assign({}, selectedThres, {
+    value: payload
+  });
+  const newListThres = [...list];
+  newListThres[selectedIdx] = newSelectedThres;
+  return Object.assign({}, state, {
+    list: newListThres
+  });
+};
+const setThresHoldUpper = (state, action) => {
+  const {
+    payload
+  } = action;
+  const {
+    list,
+    selectedIdx
+  } = state;
+  if (payload) {
+    const {
+      value,
+      curveIdx
+    } = payload;
+    const selectedThres = list[curveIdx];
+    const newSelectedThres = Object.assign({}, selectedThres, {
+      upper: value
+    });
+    const newListThres = [...list];
+    newListThres[curveIdx] = newSelectedThres;
+    return Object.assign({}, state, {
+      list: newListThres,
+      selectedIdx: curveIdx
+    });
+  }
+  const selectedThres = list[selectedIdx];
+  const newSelectedThres = Object.assign({}, selectedThres, {
+    upper: payload
+  });
+  const newListThres = [...list];
+  newListThres[selectedIdx] = newSelectedThres;
+  return Object.assign({}, state, {
+    list: newListThres
+  });
+};
+const setThresHoldLower = (state, action) => {
+  const {
+    payload
+  } = action;
+  const {
+    list,
+    selectedIdx
+  } = state;
+  if (payload) {
+    const {
+      value,
+      curveIdx
+    } = payload;
+    const selectedThres = list[curveIdx];
+    const newSelectedThres = Object.assign({}, selectedThres, {
+      lower: value
+    });
+    const newListThres = [...list];
+    newListThres[curveIdx] = newSelectedThres;
+    return Object.assign({}, state, {
+      list: newListThres,
+      selectedIdx: curveIdx
+    });
+  }
+  const selectedThres = list[selectedIdx];
+  const newSelectedThres = Object.assign({}, selectedThres, {
+    lower: payload
+  });
+  const newListThres = [...list];
+  newListThres[selectedIdx] = newSelectedThres;
+  return Object.assign({}, state, {
+    list: newListThres
+  });
+};
+const setThresHoldIsEdit = state => {
+  const {
+    list,
+    selectedIdx
+  } = state;
+  const selectedThres = list[selectedIdx];
+  const {
+    isEdit
+  } = selectedThres;
+  const newSelectedThres = Object.assign({}, selectedThres, {
+    isEdit: !isEdit
+  });
+  const newListThres = [...list];
+  newListThres[selectedIdx] = newSelectedThres;
+  return Object.assign({}, state, {
+    list: newListThres
+  });
+};
+const resetAll = (state, action) => {
+  const {
+    payload
+  } = action;
+  const {
+    list
+  } = state;
+  const newList = list.map(() => ({
+    isEdit: false,
+    value: payload && payload.thresRef,
+    upper: false,
+    lower: false
+  }));
+  return Object.assign({}, state, {
+    selectedIdx: 0,
+    list: newList
+  });
+};
+const setListThreshold = (state, action) => {
+  const {
+    payload
+  } = action;
+  const {
+    list
+  } = state;
+  if (payload && payload.length > list.length) {
+    const newList = payload.map(() => ({
+      isEdit: true,
+      value: false,
+      upper: false,
+      lower: false
+    }));
+    return Object.assign({}, state, {
+      list: newList
+    });
+  }
+  return state;
 };
 const thresholdReducer = function () {
   let state = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : initialState;
   let action = arguments.length > 1 ? arguments[1] : undefined;
   switch (action.type) {
+    case _action_type.CURVE.SET_ALL_CURVES:
+      return setListThreshold(state, action);
     case _action_type.THRESHOLD.UPDATE_VALUE:
-      return Object.assign({}, state, {
-        value: action.payload
-      });
+      return setThresHoldValue(state, action);
     case _action_type.THRESHOLD.UPDATE_UPPER_VALUE:
-      return Object.assign({}, state, {
-        upper: action.payload
-      });
+      return setThresHoldUpper(state, action);
     case _action_type.THRESHOLD.UPDATE_LOWER_VALUE:
-      return Object.assign({}, state, {
-        lower: action.payload
-      });
+      return setThresHoldLower(state, action);
     case _action_type.THRESHOLD.RESET_VALUE:
-      return Object.assign({}, state, {
-        value: action.payload
-      });
+      return setThresHoldValue(state, action);
     case _action_type.THRESHOLD.TOGGLE_ISEDIT:
-      return Object.assign({}, state, {
-        isEdit: !state.isEdit
-      });
+      return setThresHoldIsEdit(state);
     case _action_type.MANAGER.RESET_INIT_COMMON:
       return Object.assign({}, state, {
         isEdit: true
       });
     case _action_type.MANAGER.RESETALL:
-      return Object.assign({}, state, {
-        value: action.payload && action.payload.thresRef
-      });
+      return resetAll(state, action);
     default:
       return state;
   }
diff --git a/src/__tests__/units/components/cmd_bar/03_peak.test.js b/src/__tests__/units/components/cmd_bar/03_peak.test.js
index 5cfcdcf3..32463fa3 100644
--- a/src/__tests__/units/components/cmd_bar/03_peak.test.js
+++ b/src/__tests__/units/components/cmd_bar/03_peak.test.js
@@ -24,10 +24,15 @@ const store = mockStore({
     }
   },
   threshold: {
-    isEdit: true,
-    value: false,
-    upper: false,
-    lower: false,
+    selectedIdx: 0,
+    list: [
+      {
+        isEdit: true,
+        value: false,
+        upper: false,
+        lower: false,
+      }
+    ],
   },
   shift: { shifts: [] },
   cyclicvolta: {}
@@ -49,10 +54,15 @@ const nmrStore = mockStore({
     }
   },
   threshold: {
-    isEdit: true,
-    value: false,
-    upper: false,
-    lower: false,
+    selectedIdx: 0,
+    list: [
+      {
+        isEdit: true,
+        value: false,
+        upper: false,
+        lower: false,
+      }
+    ],
   },
   shift: { shifts: [] },
   cyclicvolta: {}
diff --git a/src/__tests__/units/helpers/chem.test.tsx b/src/__tests__/units/helpers/chem.test.tsx
index 8a968faa..743fad87 100644
--- a/src/__tests__/units/helpers/chem.test.tsx
+++ b/src/__tests__/units/helpers/chem.test.tsx
@@ -201,7 +201,7 @@ describe('Test for chem helper', () => {
       const state = {
         curve: { curveIdx: 0 },
         shift: { shifts: [] },
-        layout: LIST_LAYOUT.H1, threshold: { value: 55 } } // threshold at 55%
+        layout: LIST_LAYOUT.H1, threshold: { selectedIdx: 0, list: [{ value: 55 }]} } // threshold at 55%
       const props = { feature: { data: [{ x: [1, 2], y: [1, 2] }],  operation: { layout: LIST_LAYOUT.H1 }, maxY: 2, peakUp: true }}
       const peaks = Feature2Peak(state, props)
       expect(peaks).toEqual([{x: 2, y: 2}])
@@ -223,7 +223,10 @@ describe('Test for chem helper', () => {
 
   describe('Test get threshold position in the render view', () => {
     it('Get threshold position', () => {
-      const state = { shift: { ref: null }, layout: '1H', threshold: {value: 55} } // threshold at 55%
+      const state = {
+        shift: { ref: null }, layout: '1H',
+        curve: { curveIdx: 0 },
+        threshold: { selectedIdx: 0, list: [{ value: 55 }]} } // threshold at 55%
       const props = { feature: { data: [{ x: [1, 2], y: [1, 2] }],  operation: { layout: '1H'}, maxY: 2, maxX: 2, minX: 1, peakUp: true }}
       const thresholdsAt = ToThresEndPts(state, props)
       expect(thresholdsAt).toEqual([{"x": -199, "y": 1.1}, {"x": 202, "y": 1.1}])
diff --git a/src/components/cmd_bar/03_peak.js b/src/components/cmd_bar/03_peak.js
index ca534ec8..ddcee5e1 100644
--- a/src/components/cmd_bar/03_peak.js
+++ b/src/components/cmd_bar/03_peak.js
@@ -138,7 +138,7 @@ const mapStateToProps = (state, props) => ( // eslint-disable-line
     cyclicVotaSt: state.cyclicvolta,
     curveSt: state.curve,
     editPeakSt: state.editPeak.present,
-    thresSt: state.threshold,
+    thresSt: state.threshold.list[state.curve.curveIdx],
     layoutSt: state.layout,
     shiftSt: state.shift,
   }
diff --git a/src/components/cmd_bar/r03_threshold.js b/src/components/cmd_bar/r03_threshold.js
index a76991e0..2d64324a 100644
--- a/src/components/cmd_bar/r03_threshold.js
+++ b/src/components/cmd_bar/r03_threshold.js
@@ -42,13 +42,14 @@ const txtPercent = () => (
 );
 
 const setThreshold = (
-  classes, thresVal, updateThresholdValueAct,
+  classes, thresVal, updateThresholdValueAct, curveSt,
 ) => {
-  const onBlur = (e) => updateThresholdValueAct(e.target.value);
-  const onChange = (e) => updateThresholdValueAct(e.target.value);
+  const { curveIdx } = curveSt;
+  const onBlur = (e) => updateThresholdValueAct({ value: e.target.value, curveIdx });
+  const onChange = (e) => updateThresholdValueAct({ value: e.target.value, curveIdx });
   const onEnterPress = (e) => {
     if (e.key === 'Enter') {
-      updateThresholdValueAct(e.target.value);
+      updateThresholdValueAct({ value: e.target.value, curveIdx });
     }
   };
 
@@ -88,14 +89,14 @@ const restoreTp = (hasEdit, isEdit) => (
 
 const Threshold = ({
   classes, feature, hasEdit,
-  hideThresSt, thresValSt, isEditSt,
+  hideThresSt, thresValSt, isEditSt, curveSt,
   updateThresholdValueAct, resetThresholdValueAct, toggleThresholdIsEditAct,
 }) => {
   const thresVal = thresValSt || feature.thresRef;
 
   return (
     <span className={classes.groupRight}>
-      { setThreshold(classes, thresVal, updateThresholdValueAct) }
+      { setThreshold(classes, thresVal, updateThresholdValueAct, curveSt) }
       <Tooltip title={<span className="txt-sv-tp">Restore Threshold</span>}>
         <MuButton
           className={
@@ -135,8 +136,9 @@ const Threshold = ({
 const mapStateToProps = (state, props) => ( // eslint-disable-line
   {
     hideThresSt: Cfg.hideCmdThres(state.layout),
-    isEditSt: state.threshold.isEdit,
-    thresValSt: parseFloat(state.threshold.value) || 0,
+    isEditSt: state.threshold.list[state.curve.curveIdx].isEdit,
+    thresValSt: parseFloat(state.threshold.list[state.curve.curveIdx].value) || 0,
+    curveSt: state.curve,
   }
 );
 
@@ -155,6 +157,7 @@ Threshold.propTypes = {
   hideThresSt: PropTypes.bool.isRequired,
   isEditSt: PropTypes.bool.isRequired,
   thresValSt: PropTypes.number.isRequired,
+  curveSt: PropTypes.object.isRequired,
   updateThresholdValueAct: PropTypes.func.isRequired,
   resetThresholdValueAct: PropTypes.func.isRequired,
   toggleThresholdIsEditAct: PropTypes.func.isRequired,
diff --git a/src/components/cmd_bar/r05_submit_btn.js b/src/components/cmd_bar/r05_submit_btn.js
index b992f359..c1c21491 100644
--- a/src/components/cmd_bar/r05_submit_btn.js
+++ b/src/components/cmd_bar/r05_submit_btn.js
@@ -96,7 +96,7 @@ const BtnSubmit = ({
 const mapStateToProps = (state, props) => ( // eslint-disable-line
   {
     editPeakSt: state.editPeak.present,
-    thresSt: state.threshold,
+    thresSt: state.threshold.list[state.curve.curveIdx],
     layoutSt: state.layout,
     shiftSt: state.shift,
     scanSt: state.scan,
diff --git a/src/components/cmd_bar/r06_predict_btn.js b/src/components/cmd_bar/r06_predict_btn.js
index 2924486a..18d4e3a1 100644
--- a/src/components/cmd_bar/r06_predict_btn.js
+++ b/src/components/cmd_bar/r06_predict_btn.js
@@ -259,7 +259,7 @@ const mapStateToProps = (state, props) => ( // eslint-disable-line
     editPeakSt: state.editPeak.present,
     scanSt: state.scan,
     shiftSt: state.shift,
-    thresSt: state.threshold,
+    thresSt: state.threshold.list[state.curve.curveIdx],
     integrationSt: state.integration.present,
     multiplicitySt: state.multiplicity.present,
     curveSt: state.curve,
diff --git a/src/helpers/chem.js b/src/helpers/chem.js
index 53a792a3..00dff641 100644
--- a/src/helpers/chem.js
+++ b/src/helpers/chem.js
@@ -139,7 +139,7 @@ const ToFrequency = createSelector(
 );
 
 const getThreshold = (state) => (
-  state.threshold ? state.threshold.value * 1.0 : false
+  state.threshold ? state.threshold.list[state.curve.curveIdx].value * 1.0 : false
 );
 
 const Convert2Peak = (feature, threshold, offset, upThreshold = false, lowThreshold = false) => {
diff --git a/src/layer_prism.js b/src/layer_prism.js
index 5c68e1ac..0c896e7c 100644
--- a/src/layer_prism.js
+++ b/src/layer_prism.js
@@ -102,7 +102,7 @@ const LayerPrism = ({
 const mapStateToProps = (state, props) => ( // eslint-disable-line
   {
     scanSt: state.scan,
-    thresSt: state.threshold,
+    thresSt: state.threshold.list[state.curve.curveIdx],
     uiSt: state.ui,
   }
 );
diff --git a/src/reducers/reducer_threshold.js b/src/reducers/reducer_threshold.js
index 61e3d6a9..1aadf495 100644
--- a/src/reducers/reducer_threshold.js
+++ b/src/reducers/reducer_threshold.js
@@ -1,33 +1,148 @@
 /* eslint-disable prefer-object-spread, default-param-last */
-import { THRESHOLD, MANAGER } from '../constants/action_type';
+import { THRESHOLD, MANAGER, CURVE } from '../constants/action_type';
 
 const initialState = {
-  isEdit: true,
-  value: false,
-  upper: false,
-  lower: false,
+  selectedIdx: 0,
+  list: [
+    {
+      isEdit: true,
+      value: false,
+      upper: false,
+      lower: false,
+    },
+  ],
+};
+
+// const defaultThresHold = {
+//   isEdit: true,
+//   value: false,
+//   upper: false,
+//   lower: false,
+// };
+
+const setThresHoldValue = (state, action) => {
+  const { payload } = action;
+  const { list, selectedIdx } = state;
+  if (payload) {
+    const { value, curveIdx } = payload;
+    const selectedThres = list[curveIdx];
+    const newSelectedThres = Object.assign({}, selectedThres, { value });
+    const newListThres = [...list];
+    newListThres[curveIdx] = newSelectedThres;
+    return Object.assign({}, state, { list: newListThres, selectedIdx: curveIdx });
+  }
+
+  const selectedThres = list[selectedIdx];
+  const newSelectedThres = Object.assign({}, selectedThres, { value: payload });
+  const newListThres = [...list];
+  newListThres[selectedIdx] = newSelectedThres;
+  return Object.assign({}, state, { list: newListThres });
+};
+
+const setThresHoldUpper = (state, action) => {
+  const { payload } = action;
+  const { list, selectedIdx } = state;
+  if (payload) {
+    const { value, curveIdx } = payload;
+    const selectedThres = list[curveIdx];
+    const newSelectedThres = Object.assign({}, selectedThres, { upper: value });
+    const newListThres = [...list];
+    newListThres[curveIdx] = newSelectedThres;
+    return Object.assign({}, state, { list: newListThres, selectedIdx: curveIdx });
+  }
+
+  const selectedThres = list[selectedIdx];
+  const newSelectedThres = Object.assign({}, selectedThres, { upper: payload });
+  const newListThres = [...list];
+  newListThres[selectedIdx] = newSelectedThres;
+  return Object.assign({}, state, { list: newListThres });
+};
+
+const setThresHoldLower = (state, action) => {
+  const { payload } = action;
+  const { list, selectedIdx } = state;
+  if (payload) {
+    const { value, curveIdx } = payload;
+    const selectedThres = list[curveIdx];
+    const newSelectedThres = Object.assign({}, selectedThres, { lower: value });
+    const newListThres = [...list];
+    newListThres[curveIdx] = newSelectedThres;
+    return Object.assign({}, state, { list: newListThres, selectedIdx: curveIdx });
+  }
+
+  const selectedThres = list[selectedIdx];
+  const newSelectedThres = Object.assign({}, selectedThres, { lower: payload });
+  const newListThres = [...list];
+  newListThres[selectedIdx] = newSelectedThres;
+  return Object.assign({}, state, { list: newListThres });
+};
+
+const setThresHoldIsEdit = (state) => {
+  const { list, selectedIdx } = state;
+  const selectedThres = list[selectedIdx];
+  const { isEdit } = selectedThres;
+  const newSelectedThres = Object.assign({}, selectedThres, { isEdit: !isEdit });
+  const newListThres = [...list];
+  newListThres[selectedIdx] = newSelectedThres;
+  return Object.assign({}, state, { list: newListThres });
+};
+
+const resetAll = (state, action) => {
+  const { payload } = action;
+  const { list } = state;
+  const newList = list.map(() => (
+    {
+      isEdit: false,
+      value: payload && payload.thresRef,
+      upper: false,
+      lower: false,
+    }
+  ));
+  return Object.assign(
+    {},
+    state,
+    {
+      selectedIdx: 0,
+      list: newList,
+    },
+  );
+};
+
+const setListThreshold = (state, action) => {
+  const { payload } = action;
+  const { list } = state;
+  if (payload && payload.length > list.length) {
+    const newList = payload.map(() => (
+      {
+        isEdit: true,
+        value: false,
+        upper: false,
+        lower: false,
+      }
+    ));
+    return Object.assign({}, state, { list: newList });
+  }
+  return state;
 };
 
 const thresholdReducer = (state = initialState, action) => {
   switch (action.type) {
+    case CURVE.SET_ALL_CURVES:
+      return setListThreshold(state, action);
     case THRESHOLD.UPDATE_VALUE:
-      return Object.assign({}, state, { value: action.payload });
+      return setThresHoldValue(state, action);
     case THRESHOLD.UPDATE_UPPER_VALUE:
-      return Object.assign({}, state, { upper: action.payload });
+      return setThresHoldUpper(state, action);
     case THRESHOLD.UPDATE_LOWER_VALUE:
-      return Object.assign({}, state, { lower: action.payload });
+      return setThresHoldLower(state, action);
     case THRESHOLD.RESET_VALUE:
-      return Object.assign({}, state, { value: action.payload });
+      return setThresHoldValue(state, action);
     case THRESHOLD.TOGGLE_ISEDIT:
-      return Object.assign({}, state, { isEdit: !state.isEdit });
+      return setThresHoldIsEdit(state);
     case MANAGER.RESET_INIT_COMMON:
       return Object.assign({}, state, { isEdit: true });
     case MANAGER.RESETALL:
-      return Object.assign(
-        {},
-        state,
-        { value: action.payload && action.payload.thresRef },
-      );
+      return resetAll(state, action);
     default:
       return state;
   }