Abstract：Objective To evaluate turn around time(TAT)of clinical chemistry tests by laboratory information system(LIS)replace hand made method．Methods The reporting time, TAT and other relative data of clinical chemistry tests were obtained by LIS system．Results The LIS effectively improved the timeliness of laboratory personnel for the processing of the crisis value of test, and timely feedback to clinic. Conclusion The laboratory information system combines the laboratory test results and emergency treatment report and might strengthen the laboratory management and greatly improve the efficiency of laboratory work.