A kind of industry field data collector was designed based on IPORT-1 module and STM32 microprocessor,which could be used to collect kinds of data and information through 485 bus and Modbus protocol and link to computer through Ethernet.Complete communication mechanism was established, including mechanism between computer and data collector and mechanism between data collector and each kinds of equipments in industry workshop.There were two tasks for computer,one was to initialize the data collector including USART channel and communication contents;the other one was getting all the data and information in the data collector in order to realize the show task.The task of data collector was to read the necessary information which was appointed by the computer from the equipment in the industry workshop,and to send these information to the computer.Practical test proves that this scheme can realize basic industry networking requirement,which has advantages such as high reliability,convenience and low cost.