A system for performing automatic software installations and automatic software executions in a to-be-tested computer is disclosed. The system includes: a storing module (101) for storing installation and execution user-step data in the host computer 10, and generating an initialization file in the host computer (10) according to the installation and execution user-step data, a receiving module (102) for receiving software option list in a to-be-tested computer (11), and an automating module (103) for performing automatic installations and automatic executions of each software of the software option list in the to-be-tested computer (11). A related method is also disclosed.