The invention discloses an audio frequency record playback system based on a DE2 platform, comprising a DE2 developing plate and a PC machine; the DE2 developing plate is connected with the PC machine; a Cyclone II EP2C35 FPGA chip, a button control module, an audio collecting/play module, an SD card reading-writing module, an LED display module and a network transmission module are arranged on the DE2 developing plate; a JTAG debugging module is arranged on the Cyclone II EP2C35 FPGA chip, and the Cyclone II EP2C35 FPGA chip is connected with the PC machine through the JTAG debugging module; an embedded control system is arranged in the Cyclone II EP2C35 FPGA chip, and the embedded control system is composed of a SOPC system and miu Clinux operation system. The system realizes the whole process of collection, storage, and transmission of the audio frequency information.