Electrochromic device control method and electrochromic device

The embodiment of the invention provides an electrochromic device control method and an electrochromic device, gear characterization parameter data are pre-stored in the electrochromic device, and the gear characterization parameter data comprise corresponding open-circuit voltage and charge capacity data of the electrochromic device under different gears; the method comprises the steps that when a dimming instruction of a target gear is received, the current actual open-circuit voltage of the electrochromic device is acquired; and determining a charge capacity supplementary value according to the actual open-circuit voltage, the target open-circuit voltage corresponding to the target gear, and the corresponding open-circuit voltages and charge capacity data under different gears, so as to adjust the electrochromic device to be switched to the target gear. According to the method, the problem that the gear shifting cannot be interrupted in the gear shifting process can be solved, and the switching waiting tim