To provide a method and a system for retrieving molded product information for providing materials for estimating a cause of the defect of molded products.

This system has a database 2, which consists of data groups storing data obtained by examining/analyzing the defect of molded products in the past, while relating these data with a keyword for reference, capable of sorting each of data for each of keywords for reference and a computer system 1 provided with an input part 3 for inputting a keyword for retrieval concerning molded goods, in which the defect occurs, a CPU 4 for retrieving the keyword for reference matched with the keyword for retrieval sent from the input part 3 in the database 2 and extracting data concerning molded product information containing the retrieved keyword for reference from this database, and an output part 5 for outputting the molded product information on the basis of the data sent from the CPU 4.