The invention provides a reuse framework generating method, device and application system based on a J2EE distributed architecture. The method includes the following steps that 1, various frameworks are integrated into a WEB framework, WEB framework data are packaged through JS and CSS, and the WEB framework and interactive modes and formats of the WEB framework data are further packaged through AJAX; 2, generality extraction and packaging are performed on various kinds of parameter setting and service control through JSP user-defined labels; 3, a background public class, an OR-Mapping mechanism, interface service, abnormity and transaction processing service and a public assembly service module are generated; 4, the background public class is called, and the formats of the WEB framework data are converted into the data formats required by a JSP. According to the reuse framework generating method, device and application system based on the J2EE distributed architecture, a software reuse framework is low in code, low in technical content, high in efficiency, high in expansibility and good in user experience.