The invention discloses a cost control intelligent ammeter convenient to be mounted and dismounted. The cost control intelligent ammeter is provided with a housing and an internal circuit, the housing is provided with a carrier wave upper cover, a wave carrier button difficult to drop, an embedded type seal and a detachable auxiliary wiring terminal, wherein the housing is made of a flame-retardant insulation material, the internal circuit is provided with a sampling module, a metering module, a microprocessor module, a display module, an indication module, a trip-out power-off module, an ESAM module, a multi-rate metering module, a communication module and an energy storage module, and after the shaft end of the wave carrier is disengaged from an original fixation position, the button does not drop from the wave carrier upper cover. Besides, simple sealing of the housing of the ammeter is realized, wiring of wiring terminals is facilitated, the materials of binding post copper bars are reduced, and the production cost of the ammeter is decreased.