The invention discloses an electrochromic film control method and device and a computer readable storage medium, and the method comprises the steps: obtaining an RGB parameter of ambient light, and converting the RGB parameter into a corresponding digital quantity; respectively matching the corresponding red voltage signal, green voltage signal and blue voltage signal; regulating and controlling the power supply of the red color-changing film through the red voltage signal, regulating and controlling the power supply of the green color-changing film through the green voltage signal, and regulating and controlling the power supply of the blue color-changing film through the blue voltage signal; and finally, displaying red, green, and blue of a plurality of color levels corresponding to theambient light through the red color-changing film, the green color-changing film, and the blue color-changing film, respectively. According to the invention, a humanized electrochromic film control scheme is realized, so that the color of the electrochromic film can be changed according to the change of external ambient light, the external impression of the terminal equipment is further improved,and the user experience is enhanced.