The invention provides a pipeline gas residential user data processing method and a pipeline gas residential user data processing system based on average monthly gas consumption. The method specifically comprises the following steps: presetting gas management indicators for pipeline gas residential users, including monthly gas consumption continuity, average monthly gas consumption and gas payment; acquiring the actual gas consumption condition of the pipeline gas residential users, and grading the pipeline gas residential users according to preset calculation rules with the monthly gas consumption as a benchmark; and processing corresponding data of the pipeline gas residential users of different grades through a preset pipeline gas data processing mode, and outputting the data. According to the invention, residential users are graded according to the actual gas consumption condition, and corresponding differential services are offered to the customers according to the graded customer requirements and the enterprise's capability. Therefore, the service efficiency of gas management workers is improved, the security risk in gas service is reduced, and convenience is brought to gas residential users.