diff --git a/inc/mesa_sts.h b/inc/mesa_sts.h
index 2c0a8f5..ee56102 100644
--- a/inc/mesa_sts.h
+++ b/inc/mesa_sts.h
@@ -1,6 +1,31 @@
 #ifndef _MESA_STS_H_
 #define _MESA_STS_H_
 
+#define STS_RANDOM_JUDGE_NUM 15
+
+#define STS_SET_FLAG(flag, idx) (flag |= (1 << idx))
+#define STS_TEST_FLAG(flag, idx) (flag & (1 << idx))
+
+enum sts_random_judge_list_idx
+{
+	STS_FREQUENCY = 0,
+	STS_BLOCK_FREQUENCY,
+	STS_CUMULATIVE_SUMS,
+	STS_RUNS,
+	STS_LONGEST_RUN,
+	STS_RANK,
+	STS_NON_OVERLAPPING_TEMPLATE_MATCHING,
+	STS_OVERLAPPING_TEMPLATE_MATCHING,
+	STS_UNIVERSAL,
+	STS_RANDOM_EXCURSIONS,
+	STS_RANDOM_EXCURSIONS_VARIANT,
+	STS_POKER_DETECT,
+	STS_RUNS_DISTRIBUTION,
+	STS_SELF_CORRELATION,
+	STS_BINARY_DERIVATE,
+	STS_RANDOM_IDX_MAX
+};
+
 struct sts_result {
 	unsigned char frequency;
 	unsigned char block_frequency;
@@ -23,10 +48,10 @@ struct sts_result {
 extern "C" {
 #endif
 
-int mesa_statistical_test_suite(void* data,unsigned int datalen, struct sts_result* result);
+int mesa_statistical_test_suite(void* data,unsigned int datalen, struct sts_result* result, unsigned int random_judge_switch_flag);
 
 #ifdef __cplusplus
 }
 #endif
 
-#endif /*  _MESA_STS_H_  */
\ No newline at end of file
+#endif /*  _MESA_STS_H_  */
diff --git a/src/mesa_sts.c b/src/mesa_sts.c
index 5a13d2b..f95ac89 100644
--- a/src/mesa_sts.c
+++ b/src/mesa_sts.c
@@ -3,7 +3,7 @@
 #include "include/stat_fncs.h"
 #include "mesa_sts.h"
 
-int mesa_statistical_test_suite(void* data,unsigned int datalen, struct sts_result* result)
+int mesa_statistical_test_suite(void* data,unsigned int datalen, struct sts_result* result, unsigned int random_judge_switch_flag)
 {
 	TP tp;
 	tp.n = datalen;
@@ -25,25 +25,87 @@ int mesa_statistical_test_suite(void* data,unsigned int datalen, struct sts_resu
 	bitsRead = 0;
 	done = 0;
 	done = convertToBits((BYTE*)data,datalen,tp.n,&num_0s,&num_1s,&bitsRead,epsilon);
-	result->frequency = Frequency(tp.n,epsilon);
-	result->block_frequency = BlockFrequency(tp.blockFrequencyBlockLength, tp.n,epsilon);
-	result->cumulative_sums =  CumulativeSums(tp.n,epsilon);
-	result->runs = Runs(tp.n,epsilon);
-	result->longest_run = LongestRunOfOnes(tp.n,epsilon);
-	result->rank = Rank(tp.n,epsilon);
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_FREQUENCY))
+	{
+		result->frequency = Frequency(tp.n,epsilon);
+	}
+
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_BLOCK_FREQUENCY))
+	{
+		result->block_frequency = BlockFrequency(tp.blockFrequencyBlockLength, tp.n,epsilon);
+	}
+
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_CUMULATIVE_SUMS))
+	{
+		result->cumulative_sums =  CumulativeSums(tp.n,epsilon);
+	}
+
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_RUNS))
+	{
+		result->runs = Runs(tp.n,epsilon);
+	}
+
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_LONGEST_RUN))
+	{
+		result->longest_run = LongestRunOfOnes(tp.n,epsilon);
+	}
+	
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_RANK))
+	{
+		result->rank = Rank(tp.n,epsilon);
+	}
+	
 	//result->discrete_fourier_transform = DiscreteFourierTransform(tp.n,epsilon);//cost too much time
-	result->non_overlapping_template_matching = NonOverlappingTemplateMatchings(tp.nonOverlappingTemplateBlockLength, tp.n,epsilon);
-	result->overlapping_template_matching = OverlappingTemplateMatchings(tp.overlappingTemplateBlockLength, tp.n,epsilon);
-	result->universal = Universal(tp.n,epsilon);
+
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_NON_OVERLAPPING_TEMPLATE_MATCHING))
+	{
+		result->non_overlapping_template_matching = NonOverlappingTemplateMatchings(tp.nonOverlappingTemplateBlockLength, tp.n,epsilon);
+	}
+	
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_OVERLAPPING_TEMPLATE_MATCHING))
+	{
+		result->overlapping_template_matching = OverlappingTemplateMatchings(tp.overlappingTemplateBlockLength, tp.n,epsilon);
+	}
+	
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_UNIVERSAL))
+	{
+		result->universal = Universal(tp.n,epsilon);
+	}
+	
 	//result->approximate_entropy = ApproximateEntropy(tp.approximateEntropyBlockLength, tp.n,epsilon);//cost too much time
-	result->random_excursions = RandomExcursions(tp.n,epsilon);
-	result->random_excursions_variant = RandomExcursionsVariant(tp.n,epsilon);
+
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_RANDOM_EXCURSIONS))
+	{
+		result->random_excursions = RandomExcursions(tp.n,epsilon);
+	}
+	
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_RANDOM_EXCURSIONS_VARIANT))
+	{
+		result->random_excursions_variant = RandomExcursionsVariant(tp.n,epsilon);
+	}
+	
 	//result->serial = Serial(tp.serialBlockLength,tp.n,epsilon);//cost too much time
 	//sresult->linear_complexity = LinearComplexity(tp.linearComplexitySequenceLength, tp.n,epsilon);//cost too much time
-	result->poker_detect = PokerDetect(tp.PokerDetectMLength,tp.n,epsilon);
-	result->runs_distribution = RunsDistribution(tp.n,epsilon);
-	result->self_correlation = SelfCorrelation(tp.SelfCorrelationDLength,tp.n,epsilon);
-    result->binary_derivative = BinaryDerivate(tp.BinaryDerivateKLength,tp.n,epsilon,tp.n);//this function will change the value of epsilon, must be the last one
+
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_POKER_DETECT))
+	{
+		result->poker_detect = PokerDetect(tp.PokerDetectMLength,tp.n,epsilon);
+	}
+	
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_RUNS_DISTRIBUTION))
+	{
+		result->runs_distribution = RunsDistribution(tp.n,epsilon);
+	}
+	
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_SELF_CORRELATION))
+	{
+		result->self_correlation = SelfCorrelation(tp.SelfCorrelationDLength,tp.n,epsilon);
+	}
+	
+	if (STS_TEST_FLAG(random_judge_switch_flag, STS_BINARY_DERIVATE))
+	{
+		result->binary_derivative = BinaryDerivate(tp.BinaryDerivateKLength,tp.n,epsilon,tp.n);//this function will change the value of epsilon, must be the last one
+	}
 
 	free(epsilon);
 	epsilon = NULL;