diff --git a/infrastructure/src/main/kotlin/com/dobby/external/prompt/ExperimentPostKeywordMapper.kt b/infrastructure/src/main/kotlin/com/dobby/external/prompt/ExperimentPostKeywordMapper.kt
index 9d739bed..be7fdcc7 100644
--- a/infrastructure/src/main/kotlin/com/dobby/external/prompt/ExperimentPostKeywordMapper.kt
+++ b/infrastructure/src/main/kotlin/com/dobby/external/prompt/ExperimentPostKeywordMapper.kt
@@ -3,9 +3,7 @@ package com.dobby.external.prompt
 import com.dobby.enums.MatchType
 import com.dobby.enums.experiment.TimeSlot
 import com.dobby.enums.member.GenderType
-import com.dobby.external.prompt.dto.ApplyMethodDto
 import com.dobby.external.prompt.dto.ExperimentPostKeywordDto
-import com.dobby.external.prompt.dto.TargetGroupDto
 import com.dobby.model.experiment.keyword.ApplyMethodKeyword
 import com.dobby.model.experiment.keyword.ExperimentPostKeywords
 import com.dobby.model.experiment.keyword.TargetGroupKeyword
@@ -18,37 +16,36 @@ class ExperimentPostKeywordMapper {
         return ExperimentPostKeywords(
             targetGroup = dto.targetGroup?.let { targetGroupDto ->
                 TargetGroupKeyword(
-                    startAge = targetGroupDto.startAge ?: 0,
-                    endAge = targetGroupDto.endAge ?: 0,
-                    genderType = targetGroupDto.genderType?.let { genderStr ->
-                        when (genderStr) {
-                            "MALE" -> GenderType.MALE
-                            "FEMALE" -> GenderType.FEMALE
-                            "ALL" -> GenderType.ALL
-                            else -> GenderType.ALL
+                    startAge = targetGroupDto.startAge,
+                    endAge = targetGroupDto.endAge,
+                    genderType = targetGroupDto.genderType?.let {
+                        try {
+                            GenderType.valueOf(it)
+                        } catch (e: IllegalArgumentException) {
+                            null
                         }
-                    } ?: GenderType.ALL,
+                    },
                     otherCondition = targetGroupDto.otherCondition
                 )
             },
             applyMethod = dto.applyMethod?.let { applyMethodDto ->
                 ApplyMethodKeyword(
-                    content = applyMethodDto.content ?: "",
+                    content = applyMethodDto.content,
                     isFormUrl = applyMethodDto.isFormUrl,
-                    formUrl = applyMethodDto.formUrl ?: "",
+                    formUrl = applyMethodDto.formUrl,
                     isPhoneNum = applyMethodDto.isPhoneNum,
-                    phoneNum = applyMethodDto.phoneNum ?: ""
+                    phoneNum = applyMethodDto.phoneNum
                 )
             },
             matchType = dto.matchType?.let { matchTypeStr ->
                 try {
                     MatchType.valueOf(matchTypeStr)
                 } catch (e: IllegalArgumentException) {
-                    MatchType.ALL
+                    null
                 }
-            } ?: MatchType.ALL,
-            reward = dto.reward ?: "",
-            count = dto.count ?: 0,
+            },
+            reward = dto.reward,
+            count = dto.count,
             timeRequired = dto.timeRequired?.takeIf { it.isNotBlank() }?.let { timeSlotStr ->
                 try {
                     TimeSlot.valueOf(timeSlotStr)
@@ -58,30 +55,4 @@ class ExperimentPostKeywordMapper {
             }
         )
     }
-
-    fun toDto(domain: ExperimentPostKeywords): ExperimentPostKeywordDto {
-        return ExperimentPostKeywordDto(
-            targetGroup = domain.targetGroup?.let { targetGroupDomain ->
-                TargetGroupDto(
-                    startAge = targetGroupDomain.startAge,
-                    endAge = targetGroupDomain.endAge,
-                    genderType = targetGroupDomain.genderType?.name,
-                    otherCondition = targetGroupDomain.otherCondition
-                )
-            },
-            applyMethod = domain.applyMethod?.let { applyMethodDomain ->
-                ApplyMethodDto(
-                    content = applyMethodDomain.content,
-                    isFormUrl = applyMethodDomain.isFormUrl,
-                    formUrl = applyMethodDomain.formUrl,
-                    isPhoneNum = applyMethodDomain.isPhoneNum,
-                    phoneNum = applyMethodDomain.phoneNum
-                )
-            },
-            matchType = domain.matchType?.name,
-            reward = domain.reward,
-            count = domain.count,
-            timeRequired = domain.timeRequired?.name
-        )
-    }
 }
diff --git a/infrastructure/src/main/resources/prompts/keyword_extraction_prompt.json b/infrastructure/src/main/resources/prompts/keyword_extraction_prompt.json
index 5313e256..261fe6a1 100644
--- a/infrastructure/src/main/resources/prompts/keyword_extraction_prompt.json
+++ b/infrastructure/src/main/resources/prompts/keyword_extraction_prompt.json
@@ -35,7 +35,7 @@
     "conditions": [
         "공고 본문을 정확히 분석하여 각 항목에 맞는 정보를 추출한다.",
         "추출된 정보는 반드시 output_format에 따라 JSON 형태로 출력한다.",
-        "정보가 명시되지 않은 경우 해당 필드는 빈 문자열(\"\") 또는 0으로 설정한다.",
+        "정보가 명시되지 않은 경우 해당 필드는 null로 설정한다.",
         "URL이나 전화번호가 포함된 경우 해당 boolean 값을 true로 설정한다.",
         "각 항목은 지정된 최대 글자 수를 초과하지 않도록 한다."
     ]