In recent years, the development trend of the catering industry has advanced by leaps and bounds. Entrepreneurs often need to evaluate the restaurant industry in a certain area and choose a suitable place to do business. This paper mainly studies the development of an auxiliary decision-making system based on WebGIS for catering business location selection. We study and refer to the location selection theory, and combine the Analytic Hierarchy Process (AHP) to construct an evaluation and analysis model for the location selection of the catering industry. Based on GIS spatial analysis and regional analysis, WebGIS principle and computer integration technology, the catering business decision-making system is developed by using ArcGIS API for JavaScript. The system has the functions of market analysis, regional development potential assessment, location analysis and entrepreneurial decision-making. The research of this paper has certain practical significance for the practice of catering industry location selection.