The utility model relates to a data acquisition system, in particular to a data acquisition system of an air pressure transmitter in the cigarette rolling manufacturing industry, comprising a pressure transmitter, a PLC and expansion module, a serial port server, an I/O server, a data processing server, wherein the pressure transmitter is arranged on a plurality of air conveying points of production equipment; the PLC and expansion module is connected with the pressure transmitter and the serial port server; the serial port sever is connected with the I/O server which is connected with the data processing server; and the data processing server is connected with a plurality of client ends, is provided with a data monitoring module for monitoring data, and is also provided with an information feedback module for sending abnormal information to the client ends. The data acquisition system is reasonable in structure, can acquire and monitor an air pressure value of the equipment and leads the acquired and monitored air pressure data to be more real-time and more convenient and faster.