The invention discloses a software asset management system and a software and hardware information automatic grabbing method, and relates to the management device or system technology field. The asset management system comprises a fundament archive management sub-system, a software inventory management sub-system, a software utilization management sub-system, a software lease management sub-system, a computer device monitoring system, a statistical analysis sub-system, and a system management sub-system. The asset management system is used for effective management, control, and protection of software and hardware devices of users, is used to facilitate the control of the users over the purchasing costs and the utilization costs of the software, is used to improve the utilization rate and the integral benefit of the IT asset, and is used to guarantee the legality of the software utilization, and therefore the legal risks and the financial risks caused by the utilization of the software asset are prevented.