OBJECTIVE: To construct a special luciferase reporter to detect DNA methylation regulatory activity in FCER1G gene promoter regulatory element. METHODS: We constructed special full and mock methylated FCER1G gene promoter regulatory luciferase reporters by patch-methylation, and detected DNA methylation regulatory activity by comparing the luciferase activity of full-methylated luciferase reporters with mock-methylated reporters. RESULTS: We successfully constructed the full and mock methylated FCER1G gene promoter regulatory luciferase reporters. The ratio of luciferase activity between the full methylated and the mock methylated was (0.36±0.07):1 (P<0.001). CONCLUSION: FCER1G promoter activity is methylation-sensitive and is regulated by DNA methylation.