The invention discloses a system-vulnerability-analysis-based universal information system development support method and platform. The method comprises: step 1, obtaining basic information of a user and an analysis demand item and storing the information and the item into a database; step 2, according to a given analysis demand item, carrying out a system vulnerability analysis to obtain vulnerability values of the system on different disaster conditions; step 3, on the basis of results formed by the system vulnerability analysis, providing a decision-making opinion for the user to improve the system vulnerability and a system vulnerability value with consideration of the decision-making opinion; and step 4, forming a new vulnerability analysis case based on the system vulnerability analysis result determined by the user and the improved opinion and adding the new case into a case library. Therefore, according to the specific application demand of the user, the user can be helped carry out a vulnerability analysis on a to-be-analyzed system intelligently and a decision-making plan for improving the system vulnerability is provided for the user, so that the technical threshold of vulnerability application development is reduced and the application system development efficiency, quality and level are improved.