Fluconazole, as an antifungal agent, can be used mainly for fungal infectious diseases as follows: First, it can be used for systemic candidiasis, including candidemia, disseminated candidiasis, and other forms of invasive candidal infections, such as peritoneal, endocardial, pulmonary, and urinary tract. Secondly, it can also be used in patients with malignancy, special guardianship, receiving radiotherapy or chemotherapy, immunosuppressive therapy, and other patients susceptible to Candida infections. Third, it can also be used for cryptococcosis, which can be used for cryptococcal meningitis and other sites of cryptococcal infection. Fourth, it can be used for patients with normal immune function, AIDS patients, organ transplantation or other causes of immune suppression, and AIDS patients can take this drug for maintenance treatment to prevent the recurrence of cryptococcosis. Fifth, it can be used for mucocutaneous candidiasis, including oropharyngeal, esophageal and non-invasive bronchial and other mucocutaneous candidiasis. Sixth, it can be used for acute or recurrent vaginal candidiasis. Seventh, it can be used for fungal infectious diseases of the skin. In conclusion, fluconazole is mainly used for the treatment of fungal infectious diseases.