diff --git a/hutool-core/src/main/java/cn/hutool/core/math/NumberUtil.java b/hutool-core/src/main/java/cn/hutool/core/math/NumberUtil.java
index 6d40e14f4..1ad8b765c 100644
--- a/hutool-core/src/main/java/cn/hutool/core/math/NumberUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/math/NumberUtil.java
@@ -791,11 +791,10 @@ public class NumberUtil {
 		}
 		try {
 			Double.parseDouble(s);
-			return s.contains(".");
 		} catch (final NumberFormatException ignore) {
-			// ignore
+			return false;
 		}
-		return true;
+		return s.contains(".");
 	}
 
 	/**
@@ -1690,6 +1689,9 @@ public class NumberUtil {
 	 * @since 4.6.7
 	 */
 	public static boolean isValidNumber(final Number number) {
+		if(null == number){
+			return false;
+		}
 		if (number instanceof Double) {
 			return (false == ((Double) number).isInfinite()) && (false == ((Double) number).isNaN());
 		} else if (number instanceof Float) {