An electric control device for a latch includes a mounting seat having including a first compartment and a second compartment. An electric locking device includes a bracket securely mounted in the second compartment and a driving member securely mounted to the bracket. The driving member for actuating the locking member is coupled with a locking member. The locking member includes a stop portion having a protrusive end abutting a first face of the bracket without interfering with movement of the locking member. A locking cap device is pivotably connected to the mounting seat and is received in the first compartment. The locking cap device includes an inner side having a first protrusion corresponding to the stop portion. When the stop portion is located on a rotational path of the first protrusion, the locking cap device is not pivotable from a closure position to a non-closure position.