Work machine and remote operation system of work

A remote operation system remotely operating a prime mover of a work machine by an external information terminal, the remote operation system including a controller that controls the work machine and including the external information terminal, the work machine including a machine body, a work device attached to the machine body, a plurality of hydraulic actuators that drive the work device, the prime mover, a hydraulic pump that is driven by the prime mover and supplies a hydraulic operating fluid to the hydraulic actuators, an object detection device that is attached to the machine body and detects an object existing around the machine body, a photo shooting device that is attached to the machine body and shoots surroundings of the machine body, and a communication device that executes communication with the external information terminal, wherein

• the external information terminal transmits a prime mover starting command to start the prime mover to the work machine through operation by an operator,
• the controller is configured to
• determine whether or not an object exists around the machine body on a basis of a detection signal arising from detection by the object detection device,
• start the prime mover in a case in which the prime mover starting command has been acquired from the external information terminal through the communication device and in a case it is determined that an object does not exist around the machine body, and
• transmit data of video shot by the photo shooting device and a starting approval request of the prime mover to the external information terminal through the communication device without starting the prime mover in the case in which the prime mover starting command has been acquired from the external information terminal through the communication device and in a case it is determined that an object exists around the machine body,
• the external information terminal
• displays the video shot by the photo shooting device and the starting approval request of the prime mover on a display screen, and
• transmits an approval command to the work machine in a case approval operation to the starting approval request of the prime mover is executed by the operator, and
• the controller is configured to start the prime mover in a case acquiring the approval command to the starting approval request of the prime mover from the external information terminal through the communication device.