Squamous cell metaplasia refers to localized squamous epithelial metaplasia and localized squamous epithelial hyperplasia, indicating a low-grade squamous intraepithelial lesion level with the possibility of precancerous lesions. It is a cytologic test, so it does not represent the entire histologic lesion of the cervix. The diagnosis of squamous cell metaplasia can be confirmed with an electronic colposcopy. Squamous cell metaplasia is a new technology that applies high technology to the vaginal examination in conventional colposcopy. Its high resolution electronic imaging technology, high quality light source and high level of magnification allow identification of very small tissues and provide a more realistic tissue color that can be used for both diagnosis and treatment of diseases of the genital tract (i.e. vulva, vagina, cervix). Electronic colposcopy can improve the accuracy of judging cervical and genital lesions, provide a basis for early diagnosis of diseases, and enable patients to receive effective treatment in advance, resulting in a much higher cure rate. It is suitable for the diagnosis of various cervical diseases and genital lesions (sexual diseases). It can magnify the observed images by 10 to 60 times and discover tiny lesions that cannot be detected by the naked eye. Normal: No abnormalities in the physiological structures on microscopic examination. Abnormal: abnormalities: blood vessels such as spiral vessels, punctate vessels, and hairpin-like vessels. It can be judged as undetermined atypical squamous cell tumor variant, low grade squamous intracellular lesion or high grade squamous intracellular lesion with human papillomavirus infection, etc. Cervical exfoliative cytology examination is not sure of obvious abnormalities, but suspicious malignant lesions such as erosion and bleeding, white spots, etc. seen by naked eye need to be excluded.