The invention discloses a 32-bit three-channel synchronous data acquisition device with a wireless ad-hoc network function. The 32-bit three-channel synchronous data acquisition device comprises a processor which controls three 32-bit ADC chips ADS1282 to perform synchronous analogue/digital conversion on three analogue signals; conversion results are stored to a USB flash disk which is connected with a USB interface of the processor in a form of files. The processor is connected with a GPS module to perform GPS time service and positioning, is connected with an LCD to display, and is also connected with a ZigBee module to perform wireless communication. The acquisition device forms an interconnected network through an ad-hoc network function of the ZigBee module; monitoring software on a remote service monitors and controls the state of the data acquisition device in the network through the ZigBee module. According to the acquisition device disclosed by the invention, field deployment is facilitated to acquire and store the signals of three channels synchronously; the acquisition device has a wireless ad-hoc network to perform remote monitoring, and is suitable for being served as a micro-seismic monitoring system.