The concentrator is the data concentration unit of the intelligent meter reading system, which processes and exchanges the data information between the master computer and the form element. The concentrator can be flexibly configured as required to realize the timed automatic meter reading function at any time point. The data after meter reading is saved in the concentrator for the main control computer to read at any time. The main control computer can read the saved meter reading data in the concentrator through 4G, USB or Ethernet, or make the concentrator operate the collector and meter unit to extract the latest meter reading data.