diff --git a/src/frontend/src/components/QuantInput.vue b/src/frontend/src/components/QuantInput.vue
index 080d7d74..125e5aa3 100644
--- a/src/frontend/src/components/QuantInput.vue
+++ b/src/frontend/src/components/QuantInput.vue
@@ -1,4 +1,4 @@
-<!-- PrimeVue InputText Adapter Wrapper: QuantInput -->
+<!-- PrimeVue InputText Adapter Wrapper: QuantInput (Strict Numeric Filter Support) -->
 <template>
   <div class="quant-input-wrapper flex flex-col gap-1 w-full">
     <label v-if="label" class="text-xs font-bold text-slate-800">
@@ -6,18 +6,21 @@
     </label>
     <InputText
       :id="id"
-      :type="type || 'text'"
-      :modelValue="modelValue"
+      :type="inputType"
+      :modelValue="displayValue"
       :placeholder="placeholder"
       :disabled="disabled"
       :readonly="readonly"
       class="w-full h-9 px-3 border border-slate-300 rounded text-xs text-slate-900 font-medium bg-white placeholder:text-slate-400 focus:ring-2 focus:ring-blue-500 focus:border-blue-500 disabled:bg-slate-100 readonly:bg-slate-50"
+      @keydown="onKeyDown"
+      @paste="onPaste"
       @update:modelValue="onInput"
     />
   </div>
 </template>
 
 <script setup lang="ts">
+import { computed } from 'vue';
 import InputText from 'primevue/inputtext';
 
 const props = defineProps<{
@@ -33,8 +36,50 @@ const props = defineProps<{
 
 const emit = defineEmits(['update:modelValue', 'change']);
 
+const isNumeric = computed(() => props.type === 'number');
+
+const inputType = computed(() => (isNumeric.value ? 'text' : props.type || 'text'));
+
+const displayValue = computed(() => {
+  if (props.modelValue === undefined || props.modelValue === null) return '';
+  return String(props.modelValue);
+});
+
+const onKeyDown = (e: KeyboardEvent) => {
+  if (!isNumeric.value) return;
+
+  const allowedKeys = [
+    'Backspace', 'Delete', 'Tab', 'Escape', 'Enter',
+    'ArrowLeft', 'ArrowRight', 'ArrowUp', 'ArrowDown',
+    'Home', 'End', '.', '-'
+  ];
+
+  if (allowedKeys.includes(e.key) || e.ctrlKey || e.metaKey) {
+    return;
+  }
+
+  if (!/^[0-9]$/.test(e.key)) {
+    e.preventDefault();
+  }
+};
+
+const onPaste = (e: ClipboardEvent) => {
+  if (!isNumeric.value) return;
+
+  const pasteData = e.clipboardData?.getData('text') || '';
+  if (/[^0-9.-]/g.test(pasteData)) {
+    e.preventDefault();
+    const sanitized = pasteData.replace(/[^0-9.-]/g, '');
+    onInput(sanitized);
+  }
+};
+
 const onInput = (val: string | undefined) => {
-  const finalVal = val ?? '';
+  let finalVal = val ?? '';
+  if (isNumeric.value) {
+    // 숫자가 아닌 모든 문자 원천 정제
+    finalVal = finalVal.replace(/[^0-9.-]/g, '');
+  }
   emit('update:modelValue', finalVal);
   emit('change', finalVal);
 };
diff --git a/src/frontend/src/components/fields/NumberField.vue b/src/frontend/src/components/fields/NumberField.vue
index d0fc7fa2..d60eda3d 100644
--- a/src/frontend/src/components/fields/NumberField.vue
+++ b/src/frontend/src/components/fields/NumberField.vue
@@ -1,4 +1,4 @@
-<!-- Typed Field Layer: NumberField (PrimeVue InputNumber Adapter Wrapper) -->
+<!-- Typed Field Layer: NumberField (Strict Numeric Only Input Protection) -->
 <template>
   <div class="typed-number-field flex flex-col gap-1 w-full">
     <label v-if="label" class="text-xs font-bold text-slate-800">
@@ -13,6 +13,8 @@
       :minFractionDigits="0"
       :maxFractionDigits="2"
       inputClass="w-full h-9 px-3 border border-slate-300 rounded text-right font-mono text-xs text-slate-900 font-bold bg-white placeholder:text-slate-400 focus:ring-2 focus:ring-blue-500 focus:border-blue-500 focus:outline-none disabled:bg-slate-100 disabled:text-slate-500 readonly:bg-slate-50 readonly:text-slate-700"
+      @keydown="onKeyDown"
+      @paste="onPaste"
       @update:modelValue="handleInput"
     />
   </div>
@@ -29,6 +31,8 @@ const props = defineProps<{
   required?: boolean;
   readonly?: boolean;
   disabled?: boolean;
+  allowDecimal?: boolean;
+  allowNegative?: boolean;
 }>();
 
 const emit = defineEmits(['update:modelValue', 'change']);
@@ -39,6 +43,57 @@ const numericValue = computed(() => {
   return isNaN(num) ? null : num;
 });
 
+// 키다운 레벨에서 문자 입력 원천 차단
+const onKeyDown = (e: KeyboardEvent) => {
+  // 허용 키: 숫자, Backspace, Delete, Tab, Escape, Enter, 방향키, Home, End
+  const allowedKeys = [
+    'Backspace', 'Delete', 'Tab', 'Escape', 'Enter',
+    'ArrowLeft', 'ArrowRight', 'ArrowUp', 'ArrowDown',
+    'Home', 'End'
+  ];
+
+  if (allowedKeys.includes(e.key)) {
+    return;
+  }
+
+  // Ctrl/Cmd 단축키 허용 (복사, 붙여넣기, 전체선택 등)
+  if (e.ctrlKey || e.metaKey) {
+    return;
+  }
+
+  // 소수점 허용 조건 (.)
+  if (props.allowDecimal !== false && (e.key === '.' || e.key === 'Decimal')) {
+    return;
+  }
+
+  // 음수 허용 조건 (-)
+  if (props.allowNegative !== false && e.key === '-') {
+    return;
+  }
+
+  // 숫자가 아니면 키 입력 완전 방지
+  if (!/^[0-9]$/.test(e.key)) {
+    e.preventDefault();
+  }
+};
+
+// 붙여넣기 시 문자 필터링 (Sanitize)
+const onPaste = (e: ClipboardEvent) => {
+  const pasteData = e.clipboardData?.getData('text') || '';
+  // 숫자와 소수점/음수부호 외에는 모두 제거
+  const regex = props.allowDecimal === false ? (props.allowNegative === false ? /[^0-9]/g : /[^0-9-]/g) : (props.allowNegative === false ? /[^0-9.]/g : /[^0-9.-]/g);
+  if (regex.test(pasteData)) {
+    e.preventDefault();
+    const sanitized = pasteData.replace(regex, '');
+    if (sanitized) {
+      const num = Number(sanitized);
+      if (!isNaN(num)) {
+        handleInput(num);
+      }
+    }
+  }
+};
+
 const handleInput = (val: number | null) => {
   const finalVal = val === null ? '' : String(val);
   emit('update:modelValue', finalVal);