A multifunctional holder is provided for supporting a first object and a second object. The multifunctional holder includes a backboard assembly, an adapter, at least one movable arm and a positioning member. The backboard assembly is disposed on a back side of the first object. The adapter is connected to the backboard assembly. The at least one movable arm is connected to the adapter, wherein a first degree of rotational freedom is provided between the backboard assembly and the adapter, and a second degree of rotational freedom is provided between the adapter and the at least one movable arm. The positioning member is disposed on the backboard assembly or the adapter for fixing the second object.