Abstract: This paper describes a new data acquisition system for middle speed and low speed signal in ICF experiments, i.e., the FF detector. It is made up of two parts : the standard modular hardware based on VXI bus and the flexible software application developed under LabWindows/CVI. This structure takes full advantage of mature industry standard and versatile integrated development environment. It satisfies the request of measuring superthermal electrons in ICF experiments and improves the stability and precision of the old nonstandard acquisition system. In addition, the delay of system under different trigger conditions is carefully measured.