Rheumatoid arthritis requires laboratory tests such as general tests such as blood routine, liver and kidney function, etc.; specific tests such as rheumatoid factor. 1. General tests: including routine blood test, liver and kidney function, urine routine, blood sedimentation, C-reactive protein, etc., which can assess whether there is anemia, whether the body is in the active phase of inflammation, and so on. 2. Specific tests: including rheumatoid factor, anti-cyclic citrullinated peptide antibody, anti-cyclic citrullinated peptide antibody, anti-porphyrin antibody, anti-keratin antibody, immunoglobulin, and complement. Anti-cyclic citrullinated peptide antibody, anti-keratin antibody and rheumatoid factor are specific for the diagnosis of rheumatoid arthritis. Rheumatoid arthritis cannot be fully diagnosed through the above laboratory tests, but also needs to be combined with the patient’s clinical symptoms, and if necessary, X-ray, ultrasound, nuclear magnetic examination, etc. to further confirm the diagnosis. Rheumatoid arthritis patients are advised to go to the rheumatology and immunology department of regular hospitals, complete the relevant examinations and standardize the treatment according to the doctor’s instructions.