To reduce mistakes at a designing process by storing technique information in connection with information associated with the development of a computer system and extracting pertinent technique information corresponding to the input of information associated with the development so as to efficiently acquire necessary technique information.

An operator inputs information associated with the development of the computer system desired to develop and retrieves a project management storing part 22 with the identification number of a project as a key to extract corresponding information on the form of a system registered in the part 22a and a software product to be used. A technique information extracting means 12 is activated and a technique information storing part 21 is retrieved by setting this extracted information, a previously inputted process and a roll at development to be keys and a pertinent check sheet is extracted. Then, the check processing of this extracted check sheet is executed by the operator and the contents of the check processing are housed in a table managing a checking situation.