The invention relates to a method and a system for discriminating data in regulatory adjustment. The method comprises the following steps of: warehousing initial data: planning databases and approved databases; inputting data to be approved, and merging the data to be approved with approved data in a corresponding control unit into data to be analyzed; validating the data to be analyzed, and comparing the data to be analyzed with regulatory data, validating whether the requirements are met or not one by one by taking the control unit as a boundary and taking control rules as contents, and giving discrimination and analysis results; and warehousing the data to be approved, and updating the approved data in the databases if the requirements are met and the data are confirmed to be warehoused. The system comprises a remote data entry client terminal, an approval client, an inquiry client, a center management console, an application program server, a planning database server, an approved database server and Ethernet equipment. Compared with the prior art, the method and the system have the advantages that: flexibility and scientificity of urban land and facility layout are improved under the condition of controllable overall indexes, and urban development is facilitated.