Disclosed herein are a transmitting method and a receiving method of point cloud data. The transmitting method may include encoding point cloud data, encapsulating a bitstream including the encoded point cloud data into a file, and transmitting the file, the bitstream is stored in one or more tracks of the file, the file further includes signaling data, the signaling data includes at least one parameter set and viewport-related information, and the viewport-related information includes at least first viewport information or second viewport information.