diff --git a/WebContent/jsp/onl/kjb/statistics/apiStatsMinuteMan.jsp b/WebContent/jsp/onl/kjb/statistics/apiStatsMinuteMan.jsp
index f0beefe..b7ea7a2 100644
--- a/WebContent/jsp/onl/kjb/statistics/apiStatsMinuteMan.jsp
+++ b/WebContent/jsp/onl/kjb/statistics/apiStatsMinuteMan.jsp
@@ -525,35 +525,26 @@
 			$("input[name=searchStartDate], input[name=searchEndDate]").inputmask("9999-99-99", { 'autoUnmask': true });
 			$("input[name=searchStartTime], input[name=searchEndTime]").inputmask("99:99", { 'autoUnmask': true });
 
-			// 기본값 설정 (현재 시간 기준 1시간 전 정각 ~ 현재 정각)
+			// 기본값 설정 (현재 시간(분) 기준 1시간 전 ~ 현재 시간(분))
 			var now = new Date();
-			var endHour = now.getHours();
-			var startHour = endHour - 1;
-			var startDate, endDate;
+			var oneHourAgo = new Date(now.getTime() - 60 * 60 * 1000);
 
-			if (startHour < 0) {
-				startHour = 23;
-				var yesterday = new Date(now);
-				yesterday.setDate(yesterday.getDate() - 1);
-				startDate = yesterday.getFullYear() + '-' +
-					String(yesterday.getMonth() + 1).padStart(2, '0') + '-' +
-					String(yesterday.getDate()).padStart(2, '0');
-				endDate = now.getFullYear() + '-' +
-					String(now.getMonth() + 1).padStart(2, '0') + '-' +
-					String(now.getDate()).padStart(2, '0');
-			} else {
-				var today = getToday();
-				startDate = today;
-				endDate = today;
+			function formatDate(d) {
+				return d.getFullYear() + '-' +
+					String(d.getMonth() + 1).padStart(2, '0') + '-' +
+					String(d.getDate()).padStart(2, '0');
+			}
+			function formatTime(d) {
+				return String(d.getHours()).padStart(2, '0') + ':' + String(d.getMinutes()).padStart(2, '0');
 			}
 
 			if (!$("input[name=searchStartDate]").val()) {
-				$("input[name=searchStartDate]").val(startDate);
-				$("input[name=searchStartTime]").val(String(startHour).padStart(2, '0') + ':00');
+				$("input[name=searchStartDate]").val(formatDate(oneHourAgo));
+				$("input[name=searchStartTime]").val(formatTime(oneHourAgo));
 			}
 			if (!$("input[name=searchEndDate]").val()) {
-				$("input[name=searchEndDate]").val(endDate);
-				$("input[name=searchEndTime]").val(String(endHour).padStart(2, '0') + ':00');
+				$("input[name=searchEndDate]").val(formatDate(now));
+				$("input[name=searchEndTime]").val(formatTime(now));
 			}
 
 			initCharts();