A mobile phone (100) includes a main body (20), a display (21) embedded in a user interface (24) of the main body, a containing space (23) spanning through to the user interface and at least one of a top surface (26) and a back (25) of the main body, and a camera assembly (30) set in the containing space. The photo-taking apparatus includes a lens module (31), a holophote (32) rotatably set opposite the lens module for reflecting or transmitting incident light rays into the lens module, and an orientation apparatus (33) including a gear (34) for adjusting the holophote. A user can conveniently change the position of the holophote by rotating the gear, so that an object or the user himself/herself can be photographed. In all cases, the user can conveniently see a preview of the photo on the display.