An electronic apparatus includes an electronic device and a base. The electronic device has an engaging portion with at least two engaging concaves. The base has an engaging mechanism which includes a main body, at least one second engaging bump and a linkage structure. The main body has a first engaging bump. The second engaging bump is movably disposed on the main body and is adapted to move between an engaging position and a releasing position. The electronic device combines with the base such that the first engaging bump and the second engaging bump are engaged with the two engaging concaves. The linkage structure on the main body is connected to the second engaging bump. The electronic device rotates relative to the base to push the linkage structure that drives the second engaging bump from the engaging position to the releasing position to disengage from the engaging portion.