A detailed description is conducted on the maintenance and quality control of File A and File J (contains surface meteorological information), by means of the intelligent checking approaches, such as the format check, file maintenance in the operational software of ground meteorological observation and reporting, taking the computerized data processing of the National Meteorological Observation Skill Competition as an example. In combination with the experiences from manual checking, a comprehensive analysis is made of the rational coordination among manual observation items, such as clouds, visibility, weather phenomena, etc., as well as problems appearing in the ground information files, such as suspicious data, missing data, and data format error. Some technical hints and solutions for data checking are presented.