A TV backlight control method, comprising the following operations: acquiring current first ambient brightness information and a type of user in a space where a TV set is located, wherein different types of users have different requirements of brightness for picture of the TV set; determining a backlight adjustment value according to the first ambient brightness information and the type of user; and reducing a brightness value of a TV backlight of the TV set, according to the backlight adjustment value; characterized in that, prior to the operation of acquiring current first ambient brightness information and a type of user in a space where a TV set is located, the method further comprises: acquiring a plurality of second ambient brightness information in the space where the TV set is located within a first preset duration; counting a number of times of alternate appearance of a plurality of different preset brightness information after determining that the plurality of different preset brightness information alternately appear among the plurality of second ambient brightness information; determining whether the number of times is less than a first preset threshold value; after determining that the number of times is less than the first preset threshold value, executing the operation of acquiring current first ambient brightness information and a type of user in a space where a TV set is located. acquiring current first ambient brightness information and a type of user in a space where a TV set is located, wherein different types of users have different requirements of brightness for picture of the TV set; determining a backlight adjustment value according to the first ambient brightness information and the type of user; and reducing a brightness value of a TV backlight of the TV set, according to the backlight adjustment value; characterized in that, prior to the operation of acquiring current first ambient brightness information and a type of user in a space where a TV set is located, the method further comprises: acquiring a plurality of second ambient brightness information in the space where the TV set is located within a first preset duration; counting a number of times of alternate appearance of a plurality of different preset brightness information after determining that the plurality of different preset brightness information alternately appear among the plurality of second ambient brightness information; determining whether the number of times is less than a first preset threshold value; after determining that the number of times is less than the first preset threshold value, executing the operation of acquiring current first ambient brightness information and a type of user in a space where a TV set is located. acquiring a plurality of second ambient brightness information in the space where the TV set is located within a first preset duration; counting a number of times of alternate appearance of a plurality of different preset brightness information after determining that the plurality of different preset brightness information alternately appear among the plurality of second ambient brightness information; determining whether the number of times is less than a first preset threshold value; after determining that the number of times is less than the first preset threshold value, executing the operation of acquiring current first ambient brightness information and a type of user in a space where a TV set is located.