The connected service, based on smart home, wearable products and smart phone, can automatically analyze the user's preferences regarding font size, screen brightness, volume and temperature, and adjust the relevant parameters accordingly through the in-car lighting, screen backlight and BCM AC control modules. For example, if the user prefers large font size and high brightness for phone setting, and the smart home system sets the temperature at 24 degrees centigrade and plays loud music, the system will follow the same settings when the user enters the car.