A method of removing sludge from a drain pipe used for cleaning a drain pipe comprises a piling step, a platform setting step, a drilling path planning step, a coil deploying step, a conveying bracket lifting step, a guiding step, a drilling step, and a cleaning step. In the piling step, a plurality of supporting columns are provided around the opening of the drain pipe. In the platform setting step, a work platform is provided on the plurality of supporting columns. In the drilling path planning step, a drilling path is planned. In the coil deploying step, an induction coil group is placed above the drain pipe. In the conveying bracket lifting step, a conveying bracket is hung by lifting equipment so that the conveying bracket is aligned with the opening of the drain pipe. In the guiding step, the drill bit is guided to the opening of the drain pipe using the conveying bracket. In the drilling step, the drill bit is controlled to drill into the clogged bulk in the drain pipe. In the cleaning step, the waste generated by drilling is cleaned.