Method of controlling robot system

1. A method of controlling a robot system, the method comprising:

receiving a user input by a user, the user input comprising a request for delivery of a predetermined article, by a first robot;

transmitting information based on the user input to a server, by the first robot;

identifying a second robot for supporting a task corresponding to the request for delivery, by the server;

requesting the task from the second robot, by the server;

upon the second robot arriving at a delivery destination, informing of arrival at the delivery destination to the server, by the second robot;

informing that the second robot has arrived at the delivery destination to the first robot, by the server;

outputting a message informing that the second robot has arrived at the delivery destination, by the first robot;

receiving, by the second robot, the article; and

moving the second robot to the delivery destination included in the request for delivery.

2. The method according to claim 1 , wherein the delivery destination is where the first robot is located or is a specific place included in the user input.

3. The method according to claim 1 , wherein the step of the second robot moving to the delivery destination comprises:

when a place designated as the delivery destination is included in the request for delivery, moving the second robot to the designated place; and

when the place designated as the delivery destination is not included in the request for delivery, moving the second robot moving to a place where the first robot is located.

4. The method according to claim 1 , further comprising:

prior to the second robot receiving the article, moving the second robot to an article reception place.

5. The method according to claim 4 , further comprising:

outputting another message informing of delivery request particulars upon the second robot arriving at the article reception place, by the second robot.

6. The method according to claim 1 , further comprising:

upon the second robot confirming receiving the article, transmitting an interim report comprising notification of receiving the article and movement of the second robot to the delivery destination, to the server, by the second robot;

transmitting the interim report to the first robot, by the server; and

outputting another message corresponding to the interim report, by the first robot.

7. The method according to claim 1 , wherein the step of identifying the second robot comprises selecting the second robot from among a plurality of second robots based on at least one of whether the second robots are performing tasks, distances between the second robots and the first robot, and times at which the second robots are expected to finish current tasks, by the server.

8. The method according to claim 1 , further comprising:

upon the second robot confirming receiving the article, reporting completion of the task to the server, by the second robot; and

updating data corresponding to the first robot and the second robot based on the second robot reporting completion of the task, by the server.

9. The method according to claim 1 , further comprising:

outputting predetermined information as an image and speech to the user, by the first robot; and

delivering the article, by the second robot.

10. A method of controlling a robot system, the method comprising:

receiving a user input by a user, the user input comprising a request for delivery of a predetermined article, by a first robot;

identifying a second robot for supporting a task corresponding to the request for delivery, by the first robot;

requesting the task from the second robot, by the first robot;

receiving the article, by the second robot;

moving to a delivery destination included in the request for delivery, by the second robot;

upon the second robot arriving at the delivery destination, transmitting a signal informing of arrival at the delivery destination to the first robot, by the second robot; and

outputting a message informing that the second robot has arrived at the delivery destination, by the first robot.

11. The method according to claim 10 , wherein the delivery destination is where the first robot is located or is a specific place included in the user input.

12. The method according to claim 10 , wherein the step of the second robot moving to the delivery destination comprises:

when a place designated as the delivery destination is included in the request for delivery, moving the second robot to the designated place; and

when the place designated as the delivery destination is not included in the request for delivery, moving the second robot to a place where the first robot is located.

13. The method according to claim 10 , further comprising:

prior to the second robot receiving the article, moving the second robot to an article reception place.

14. The method according to claim 13 , further comprising:

outputting another message informing of delivery request particulars upon arriving at the article reception place, by the second robot.

15. The method according to claim 10 , further comprising:

upon the second robot confirming receiving the article, transmitting an interim report comprising notification of receiving the article and movement of the second robot to the delivery destination, to the first robot, by the second robot; and

outputting another message corresponding to the interim report, by the first robot.

16. The method according to claim 10 , wherein the step of identifying the second robot comprises selecting the second robot from among a plurality of second robots based on at least one of whether the second robots are performing tasks, distances between the second robots and the first robot, and times at which the second robots are expected to finish current tasks, by the first robot.

17. The method according to claim 10 , further comprising:

upon the second robot confirming receiving the article, reporting completion of the task to a server, by the second robot; and

updating data corresponding to the first robot and the second robot based on the reporting completion of the task, by the server.

18. The method according to claim 10 , further comprising:

outputting predetermined information as an image and speech to the user, by the first robot; and

delivering the article, by the second robot.