A display system for a work machine comprising: an imaging device configured to acquire captured image data representing a captured image of an operation mechanism forming a work machine and a periphery of the operation mechanism; a distance sensor configured to acquire distance image data representing a distance from the work machine to each of the operation mechanism and an object, which exists around the operation mechanism, in an imaging range of the imaging device; a slave control device that is mounted in the work machine, and has a function of transmitting the captured image data according to a first communication method; a master control device that has a function of receiving the captured image data according to the first communication method; and an image output device configured to display an image of the operation mechanism of the work machine and the periphery of the operation mechanism, the image being represented by the captured image data that is transmitted from the slave control device and received by the master control device, wherein the master control device generates a point cloud image based on the distance image data, characterized in that the slave control device has a function of transmitting the distance image data according to a second communication method different from the first communication method; the master control device has a function of receiving the distance image data according to the second communication method; and in that the master control device determines whether or not communication according to the first communication method is interrupted, and causes the image output device to display the point cloud image instead of the image of the operation mechanism of the work machine and the periphery of the operation mechanism on a condition that the communication is determined to be interrupted. an imaging device configured to acquire captured image data representing a captured image of an operation mechanism forming a work machine and a periphery of the operation mechanism; a distance sensor configured to acquire distance image data representing a distance from the work machine to each of the operation mechanism and an object, which exists around the operation mechanism, in an imaging range of the imaging device; a slave control device that is mounted in the work machine, and has a function of transmitting the captured image data according to a first communication method; a master control device that has a function of receiving the captured image data according to the first communication method; and an image output device configured to display an image of the operation mechanism of the work machine and the periphery of the operation mechanism, the image being represented by the captured image data that is transmitted from the slave control device and received by the master control device, wherein the master control device generates a point cloud image based on the distance image data, characterized in that the slave control device has a function of transmitting the distance image data according to a second communication method different from the first communication method; the master control device has a function of receiving the distance image data according to the second communication method; and in that the master control device determines whether or not communication according to the first communication method is interrupted, and causes the image output device to display the point cloud image instead of the image of the operation mechanism of the work machine and the periphery of the operation mechanism on a condition that the communication is determined to be interrupted.