Abstract: Provided are a method and a system for presenting a trajectory of a robot and an environmental map, where environmental map data and data of trajectory of movement of the robot which are created by the robot are acquired by a user terminal, and further the environmental map is displayed as a background and the trajectory is displayed as a foreground on the user terminal, and the trajectory is refreshed at a frequency greater than that of the environment map, thereby solving the problem that the trajectory is updated slowly and cannot be displayed in real time with a lag, thereby improving the user experience.

Abstract: An intelligent device control method applied to an intelligent device, including the steps of: providing a mobile terminal configured to send a control instruction to the intelligent device, inputting the control instruction on the mobile terminal and converting the control instruction into an audio signal, sending the audio signal to the intelligent device, enabling the intelligent device to receive the audio signal, convert the audio signal to restore it to the control instruction, and read the control instruction, and executing a corresponding action according to the control instruction. The intelligent device control method is capable of making the transmission processes of control instructions simplified and efficient and improving the user experience. An intelligent device system is also disclosed.