The invention discloses a code defect predicting method and device, and relates to the technical field of code defect detection. Workload of workers for test of code defects is reduced. According to the technical scheme, the method comprises the following steps: acquiring attribute information of a target code; determining code defect information corresponding to the target code and a corresponding relation between the storage attribute information in the code defect library and code defect information according to the attribute information in a code defect library and the attribute information of the target code; outputting the code defect information which corresponds to the target code, wherein the code defect information is used for predicting defects existing in the target code. The code defect predicting method and device are mainly used for predicting defects existing in the target code.