A server comprising: a first communication unit configured to communicate with at least one computing device (120_1 through 120_n) and at least one display; a second communication unit configured to receive content database, DB, information by being connected to at least one external device; a memory configured to store a program for operating the server; and a processor configured to control operations of the server by using the program, wherein the processor is further configured to: receive, in real time, information about a first user and identification, ID, information of a zone from a computing device among the at least one computing device through the first communication unit as a check-in or a check-out of the computing device with respect to the zone is detected, obtain the content DB information from an external device among the at least one external device through the second communication unit by using the ID information of the zone, detect targeted content from the content DB information by using information about a user regarding the zone, and transmit the targeted content to a display provided in the zone through the first communication unit, wherein the processor is further configured to: detect the targeted content by using the information about the user regarding the zone, which comprises the information about the first user, when the information about the first user is received as the check-in of the computing device with respect to the zone is detected, and detect the targeted content by using the information about the user regarding the zone, excluding the information about the first user and using information based on a user in the zone who is different from the first user when the information about the first user is received as the check-out of the computing device with respect to the zone is detected. a first communication unit configured to communicate with at least one computing device (120_1 through 120_n) and at least one display; a second communication unit configured to receive content database, DB, information by being connected to at least one external device; a memory configured to store a program for operating the server; and a processor configured to control operations of the server by using the program, wherein the processor is further configured to: receive, in real time, information about a first user and identification, ID, information of a zone from a computing device among the at least one computing device through the first communication unit as a check-in or a check-out of the computing device with respect to the zone is detected, obtain the content DB information from an external device among the at least one external device through the second communication unit by using the ID information of the zone, detect targeted content from the content DB information by using information about a user regarding the zone, and transmit the targeted content to a display provided in the zone through the first communication unit, wherein the processor is further configured to: receive, in real time, information about a first user and identification, ID, information of a zone from a computing device among the at least one computing device through the first communication unit as a check-in or a check-out of the computing device with respect to the zone is detected, obtain the content DB information from an external device among the at least one external device through the second communication unit by using the ID information of the zone, detect targeted content from the content DB information by using information about a user regarding the zone, and transmit the targeted content to a display provided in the zone through the first communication unit, wherein the processor is further configured to: detect the targeted content by using the information about the user regarding the zone, which comprises the information about the first user, when the information about the first user is received as the check-in of the computing device with respect to the zone is detected, and detect the targeted content by using the information about the user regarding the zone, excluding the information about the first user and using information based on a user in the zone who is different from the first user when the information about the first user is received as the check-out of the computing device with respect to the zone is detected.