The invention discloses a method for interconnection and interworking of a four-meter-in-one collection concentrator and an interface converter; a message of a CJ/T188 structure is converted into a message of a DL/T645 structure, that is to say, the message of the CJ/T188 structure is wrapped with the message of the DL/T645, then a new message is formed, and the message of the CJ/T188 structure is transmitted between the 'four-meter-in-one' collection concentrator and the interface converter; through the method, the concentrator running on site is upgraded through a program, a requirement of 'four-meter-in-one' collection can be met, the concentrator is not needed to be replaced, and 'four-meter-in-one' collection promotion and construction costs and construction difficulties are effectively reduced. A data transmission protocol between the concentrator and the interface converter is unified by the method, the function detection before network access of equipment is specified, and the quality management and control capacity of the concentrator and the interface converter is effectively enhanced.