A projection apparatus and an operation method thereof are provided. The projection apparatus may include a projector, a detector, and a processor. The projector may be configured to project an image to a projection area. The detector may be configured to detect an ID pattern disposed onto the projection area and a position of the ID pattern. The processor may be configured to generate a projection image including content corresponding to the detected ID pattern such that the content is projected to the position corresponding to the detected ID pattern. The processor may be further configured to control the projector to project the generated projection image.