A method for providing a manual based on a wearable device according to an embodiment of the present disclosure, as a method for providing an augmented reality (AR)-based manual by a manual application executed by at least one processor of the wearable device, comprises obtaining at least one piece of AR manual content for a first work; and providing the AR manual content by executing the obtained AR manual content, wherein the providing AR manual content includes providing head position AR content that visualizes a head pose describing 3D position and 6 degrees of freedom information of the head of a user who has performed the first work and providing guidance image information that provides guidance on a first process within the first work.