High-speed dynamic spectrum data of transient detection has become the major means of access to transient information. However, in terms of the characteristic of spectral data excessiveness and transience in the dynamic spectral detection system, the linear charge-coupled device (CCD) used in the system should have real-time-output and match the high-speed data storage equipment. Based on the transient spectrum characteristic, we introduce a high-speed dynamic spectrum data acquisition system with a high-linear array CCD. Through the field of programming gate array, the system provides an accurate driving clock for CCD and generates the control signals for analog-to-digital (A/D) conversion, storage, and transmission. Finally, the collected data by the peripheral component interconnect bus are summarized and filtered in the host computer. The results show that the CCD can stably work with a 40-MHz clock, and the frame scanning frequency can achieve 73 KHz. This design can remarkably complete the real-time measurement of the denotation transient temperature and achieve high-speed spectral information collection and storage with high accuracy and frame scanning frequency. It can be applied to other transient information acquisition.