The invention relates to the technical field of a clinical laboratory information system, and specifically relates to a laboratory information system. The laboratory information system comprises software login and preprocessing, wherein the software login is connected with a main interface; the main interface includes a login instrument, newly increasing, modifying and deleting of a specimen, adding, deleting and modifying of a specimen examination item, modifying of an examination item result value, query of a report, comparison of historical data, checking of an audited specimen, comments of a specimen, deleting and reverse auditing, auditing and printing of a report, making up printing of a report, converting of users, and matters needing attention; and the preprocessing includes printing of bar codes, processing of a specimen, logging of a specimen, single editing, batch editing, batch importing, a sample logging list, a sample undertaking and forwarding tracking, setting of hospital department doctors, and setting of logistics. The laboratory information system has the advantages that by means of deepening and improvement of the LIS system function, practicality and reliability of an LIS system can be improved; the work efficiency and accuracy of the laboratory information system can be improved; and the laboratory information system is suitable for promotion and usage.