Indoor positioning system and control method

The invention relates to an indoor positioning system and a control method. The method comprises the steps of: judging whether an infrared receiving array identifies a first laser beam sent by a lasertransmitter or not, if so, obtaining first coordinate information corresponding to an infrared receiving module receiving the first laser beam and executing the next step, and otherwise, repeating the step; controlling the laser transmitter to send a second laser beam, judging whether the infrared receiving array identifies the second laser beam sent by the laser transmitter or not, if so, obtaining second coordinate information corresponding to the infrared receiving module receiving the second laser beam and executing the next step, and otherwise, repeating the step; and, according to the first coordinate information, the second coordinate information and an adjustable included angle theta, obtaining the space coordinate of the corresponding position of the laser transmitter by calculation through a pre-set for