A notebook computer includes a display connected to a base by a pivot. The base defines a receiving space by a cover and a housing. The notebook computer further includes a telescopic mechanism arranged near the pivot in the receiving space. The telescopic mechanism protrudes from the housing via a first through hole defined in a bottom of the housing to maintain the base at certain inclination on a supporting surface; the notebook computer is in a first working state. The notebook computer switches to a second working state from the first working state when the telescopic mechanism retracts into the housing.