Endocrine laboratory tests are important tests in endocrinology and are especially important for the diagnosis and treatment of many diseases, the common ones are as follows. Diabetes-related tests, including glycosylated hemoglobin, OGTT test, insulin-related antibody test, etc. Tests for osteoporosis, including bone metabolism indicators such as bone mineral density, vitamin D3, blood calcium, and urinary calcium/urinary phosphorus ratio. Sex hormone examination, including follicle stimulating hormone (FSH), luteinizing hormone (LH), estradiol (E2), progesterone (P), testosterone (T), prolactin (PRL). Thyroid function tests, including triiodothyronine (TT3), thyroxine (TT4), free T3 (FT3), free T4 (FT4), thyroid stimulating hormone (TSH), thyroid peroxidase antibody (TPOAb), thyroglobulin antibody (TGAb), thyroid stimulating receptor antibody (TRAb), etc. Pituitary hormone tests include cortisol rhythm, adrenocorticotropic rhythm, growth hormone, etc. In addition, there are also tests for stimulating and inhibiting hormones. Before determining the specific tests, the clinician needs to interview the patient and make a choice according to the patient’s specific situation, not just any test you want to do. There are many endocrine tests, and it is necessary to select normal test indicators according to different diseases in order to make a clear diagnosis and early treatment.