diff --git a/js/Draw/MLP/MLPView.js b/js/Draw/MLP/MLPView.js
index 328dc96..41f5bc2 100644
--- a/js/Draw/MLP/MLPView.js
+++ b/js/Draw/MLP/MLPView.js
@@ -16,6 +16,10 @@ class MlpView extends Playable {
     this.selected = false;
   }
 
+  isEval() {
+    return this.mode == "eval";
+  }
+
   getAllParameters() {
     let layersParameters = [];
 
@@ -90,7 +94,10 @@ class MlpView extends Playable {
 
   handleSetMode(mode) {
     this.setMode(mode);
-    this.isInitialized() && this.checkCompleted();
+    if (this.isInitialized()) {
+      this.setGraphComponentData();
+      this.checkCompleted();
+    }
   }
 
   handleSetZenMode(mode) {
@@ -407,7 +414,7 @@ class MlpView extends Playable {
       { func: "text", args: [`Total Parameters: ${totalParams}\n`, x, y - 10] },
     ];
 
-    const commands = this.getMode() == "train" ? this.getTrainCommands() : [];
+    const commands = this.isEval() ? [] : this.getTrainCommands();
 
     executeDrawingCommands([...commands, ...common]);
   }
diff --git a/js/Draw/MLP/Playable.js b/js/Draw/MLP/Playable.js
index 1cfd4a4..250fca0 100644
--- a/js/Draw/MLP/Playable.js
+++ b/js/Draw/MLP/Playable.js
@@ -75,8 +75,14 @@ class Playable extends Draggable {
       this.x - (graphComponent.w - this.w) / 2,
       this.y - 400,
     );
-    graphComponent.setData(this.origin.getLossData());
     this.graphComponent = graphComponent;
+    this.setGraphComponentData();
+  }
+
+  setGraphComponentData() {
+    this.graphComponent?.setData(
+      this.isEval() ? this.origin.getEvalLoss() : this.origin.getTrainLoss(),
+    );
   }
 
   removeGraphComponent() {
@@ -134,13 +140,12 @@ class Playable extends Draggable {
   }
 
   checkCompleted() {
-    const isEval = this.getMode() == "eval";
     this.pause();
     this.updateStatus(
       +(
         (this.getInput() instanceof InputLayer ||
           this.getInput() instanceof DigitComponent) &&
-        (isEval || this.getOutput() instanceof OutputLayer)
+        (this.isEval() || this.getOutput() instanceof OutputLayer)
       ),
     );
 
@@ -304,16 +309,17 @@ class Playable extends Draggable {
   async executeOnce() {
     let startTime = performance.now();
     const inputData = this.getInput().getData();
+    const origin = this.origin;
     this.calculationComponent?.setInputData(
       inputData.slice(0, 5).map((row) => row.slice(0, 5)),
       [parseInt(this.batchSize), this.getInput().shape[1]],
     );
     const outputData = this.getOutput()?.getData() ?? null;
-    const mlp_output = await this.origin.forward(inputData);
+    const mlp_output = await origin.forward(inputData);
     this.calculationComponent && this.setCalculationData();
-    await this.origin.backward(mlp_output, outputData);
+    outputData && (await origin.backward(mlp_output, outputData));
     this.updateParameters();
-    this.graphComponent?.setData(this.origin.getLossData());
+    this.setGraphComponentData();
     this.setMsPerStepText(performance.now() - startTime + "ms / step");
   }
 
diff --git a/js/MLP/Mlp.js b/js/MLP/Mlp.js
index 57fba82..d139aa2 100644
--- a/js/MLP/Mlp.js
+++ b/js/MLP/Mlp.js
@@ -52,12 +52,15 @@ class MLP extends MlpParams {
   }
 
   backward(mlp_output, y_batch) {
-    if (this.mode == "eval") return;
     const loss = errFuncManager.getFunction(this.errFunc)(
       mlp_output,
       new Tensor(y_batch),
     );
-    this.addLossData(loss.data[0][0]);
+    if (this.mode == "eval") {
+      this.addEvalLoss(loss.data[0][0]);
+      return;
+    }
+    this.addTrainLoss(loss.data[0][0]);
 
     this.zeroGrad();
     loss.backward();
@@ -74,14 +77,16 @@ class MLP extends MlpParams {
       biases: biases.map((b) => b.data),
       seenRecordNum: this.seenRecordNum,
       stepCounter: this.stepCounter,
-      lossData: this.lossData,
+      trainLoss: this.trainLoss,
+      evalLoss: this.evalLoss,
     };
   }
 
-  import({ weights, biases, seenRecordNum, stepCounter, lossData }) {
+  import({ weights, biases, seenRecordNum, stepCounter, trainLoss, evalLoss }) {
     this.seenRecordNum = seenRecordNum;
     this.stepCounter = stepCounter;
-    this.lossData = lossData;
+    this.trainLoss = trainLoss;
+    this.evalLoss = evalLoss;
     for (let i = 0; i < this.layers.length; i++) {
       this.layers[i].setParameters(weights[i], biases[i]);
     }
diff --git a/js/MLP/MlpParams.js b/js/MLP/MlpParams.js
index c0bd120..af91c25 100644
--- a/js/MLP/MlpParams.js
+++ b/js/MLP/MlpParams.js
@@ -9,15 +9,24 @@ class MlpParams {
     this.epoch = 0;
     this.seenRecordNum = 0;
     this.mode = "train";
-    this.lossData = [];
+    this.trainLoss = [];
+    this.evalLoss = [];
   }
 
-  getLossData() {
-    return this.lossData;
+  getTrainLoss() {
+    return this.trainLoss;
   }
 
-  addLossData(lossData) {
-    this.lossData.push(lossData);
+  getEvalLoss() {
+    return this.evalLoss;
+  }
+
+  addTrainLoss(lossData) {
+    this.trainLoss.push(lossData);
+  }
+
+  addEvalLoss(lossData) {
+    this.evalLoss.push(lossData);
   }
 
   setLr(lr) {