A software distribution system comprises a computer; a first distribution device; and a second distribution device, wherein the computer includes a first software reception unit configured to receive the software; a second software reception unit configured to receive the test program corresponding to the software; and a software execution unit configured to merge the software described in an executable format and the test program, and execute, the second software reception unit attempts to acquire a test program corresponding to the software at a timing at which the first software reception unit has received the software, and makes repeated attempts at a predetermined interval when the test program cannot be acquired, and the software execution unit merges the software and the test program at a timing at which the second software reception unit has received the test program.