Abstract: In recent years， clinical testing gradually has developed into medical laboratories. Clinical workers need to keep up with the trend of the development and to  understand the endless stream of test items in depth and comprehensively. Interpreting the clinical value of common test items accurately and effectively would be undoubtedly important for improving the clinical diagnosis and treatment.  Many clinical test items and factors  will affect the interpretation of the test results. The interpretation of the test reports must understand the limitations of the testing methods and instruments， and fully evaluate the errors and uncertainties of the test methods. The reports  should be analyzed from the processes of preexamination， examination and postexamination. Also different methods might exert effect  in reference interval， medical decision and clinical significance. Interpretation of test results can not be separated from clinical circumstances， and final interpretation must be combined with clinical judgment.

Key words: medical , laboratory science；diagnosis；treatment