The invention discloses a control system of a low power consumption read/write register. The control system comprises a bus interface, a plurality of register modules and a clock generator, wherein, the clock generator comprises a plurality of clock gate control units that respectively generate clock signals with the frequency lower than that of a bus clock, the clock signals are output to the corresponding register modules to act as a visit clock of the register module; the bus interface comprises a plurality of read/write data synchronous units of the register modules which can respectively realize data reading and writing to different register modules of the bus interface. As the invention improves the clock signal generation method involving the read/write part of the register in the control system, leads the working clocks of different register modules to be mutual-independent, and carries out dynamic gate control according to respective work or idle status, and modifies the position of the gate control unit, therefore, the power consumption of the system is greatly reduced.