To provide a test atmosphere equivalent to a case in which the test atmosphere is included in a product and a test case during a product development time in verification of a function that automatically constructs a test atmosphere for testing a case in which a plurality of function blocks constituting a system LSI operate at a time and performs functional operation of the system LSI as a product for guarantee.

In this test atmosphere construction system, a function block specification information storing part 111 stores information showing a function block that operates in connection with specification information of a prescribed function block while associated with the specification information. Therefore, even though a function block that operates in accordance with a test condition is not set, a test case generating part 131 acquires information about a function block that operates in accordance with the test condition from the function block specification information storing part 111 and can automatically generate a test case in which a plurality of function blocks operate in association with one another.