According to one embodiment, an information processing apparatus includes a display unit pivotally installed on a housing and including a magnet unit, a magnetic sensor unit incorporated in the housing to detect a movement of the magnet unit, a conversion unit which converts a magnetic force detected by the magnetic sensor unit into a pulse signal having a pulse width, a detection unit which detects an angle made by the display unit and the housing based on the pulse signal converted by the conversion unit and having the pulse width, a storage unit which stores table information storing an operation corresponding to a predetermined angle, and an operation unit which performs the predetermined operation based on the table information when the detected angle has increased to the predetermined angle, and performs the predetermined operation based on the table information when the detected angle has decreased to the predetermined angle.