The invention provides a data transmission method and device and intelligent electronic equipment. The method comprises the following steps: transforming target data to be transmitted into a character stream according to a preset format, wherein the preset format comprises an identification field, a value field used for representing a numerical value, and a length field used for representing the length value of the value field; and sending the character stream to a data receiving terminal to cause the data receiving terminal to reduce the character stream into target data according to the preset format. In the method, research and development personnel do not need to additionally add an interface when new business requirements are in the presence, and therefore, time and labor are saved. In addition, since the character stream consists of numeric type character strings in a transmission process, hardware design space can be saved, implementation is convenient, and availability is high.