Work machine

A work machine including a controller that is connectable to a first communication network for a communication with outside of the work machine, the controller

• generating service request information having:
• a function type corresponding to each of a plurality of remote service functions to remotely operate the work machine and refer to internal information of the work machine;
• an operating mode indicating an operation state of the work machine;
• and a first communication performance measured at the first communication network, and transferring the generated service request information to outside of the machine via the first communication network, and
• receiving service execution information from outside of the machine via the first communication network, the service execution information having:
• execution possibility of a service function corresponding to a function type included in the service request information;
• a condition for the operating mode that permits execution of a service function corresponding to a function type included in the service request information;
• and a condition for communication performance that permits execution of a service function corresponding to a function type included in the service request information;
• wherein the operating mode includes:
• an internal control/external reference mode that enables the work machine to operate only by an instruction from inside of the work machine and enables only data reference of the work machine for an access from outside of the machine via the first communication network;
• an internal control mode that enables the work machine to operate only by an instruction from inside of the work machine and disables access from outside of the machine via the first communication network when a detected available communication performance is less than a threshold standard;
• and
• an external control mode that does not accept an instruction from inside of the work machine to operate the work machine and enables the work machine to operate only for an access from outside of the machine via the first communication network,
• wherein the operating modes change only when a transition condition including a communication performance and a change in operating state of the work machine is met.