Constant value display method of multi-functional measuring and control device

The invention discloses a constant value display method of a multi-functional measuring and control device. Without changing an original constant value acquired by an original measuring and control device, the constant value display method constructs a configuration file according to a display demand to realize to convert between the original constant value and a constant display value needed for a client. According to the constant value display method of the multi-functional measuring and control device, the configuration file is configured according to the user demand, the constant display value is displayed according to the demand, and the problems that an existing display method includes constant value items for which the user does not care, and the constant value items are easy to produce ambiguity and very inconvenient for the user in the use process are solved.