The invention provides an information system fault model construction method and system based on a graph database. The method comprises the steps of obtaining resource data of all resource objects inan information system; constructing a graph data model according to the resource data; when it is monitored that the abnormal information exists in the graph data model, extracting vertex informationand side information corresponding to the vertex generating the abnormal information from the graph data model within preset time; and establishing a fault model of the information system according tothe vertex information and the side information. According to the method and system, the characteristic that the graph database is a non-relational database which is simple, convenient and quick to inquire is utilized to establis a graph data model of the information system; the query time of the relationship between the resource objects can be greatly shortened through graphical design, so thatwhen abnormal information is monitored, the data query time is greatly shortened, the fault model can be accurately and quickly established to assist operation and maintenance personnel in processingsimilar faults, and the fault processing efficiency is improved.