Provided are an augmented reality (AR) remote communication method and system for providing a security function for a 3D space. An AR remote communication method of providing, by a computing device, communication within an AR environment based on an image of a three-dimensional (3D) space whose give area is secured includes obtaining a physical space image of a physical space around a user, setting a 3D security area based on the obtained physical space image, performing security processing for converting the physical space image based on the set 3D security area, and providing a security image generated by performing the security processing.