An electronic paper controlling apparatus comprising: an interface configured to connect between the electronic paper controlling apparatus and a plurality of electronic papers (200-N); a communication unit configured to read or write identification, ID, information of the plurality of electronic papers (200-N) through the interface; and a controller configured to control the communication unit to communicate with the plurality of electronic papers (200-N), based on the ID information; wherein the plurality of electronic papers (200-N) comprises a first electronic paper directly coupled to the interface, a third electronic paper directly coupled to the interface, and a second electronic paper indirectly coupled to the interface through the first electronic paper and the third electronic paper; and wherein the controller is further configured to: determine a coupling order of coupling the first electronic paper, the second electronic paper, and the third electronic paper to the interface based on the ID information; control an electronic paper determined from among the plurality of electronic papers (200-N) to display a contents list and an electronic papers list, wherein the electronic papers list indicates the plurality of electronic papers (200-N) according to the determined coupling order; receive a selection of a content included in the contents list and an electronic paper included in the electronic papers list; and transmit the selected content to the selected electronic paper. an interface configured to connect between the electronic paper controlling apparatus and a plurality of electronic papers (200-N); a communication unit configured to read or write identification, ID, information of the plurality of electronic papers (200-N) through the interface; and a controller configured to control the communication unit to communicate with the plurality of electronic papers (200-N), based on the ID information; wherein the plurality of electronic papers (200-N) comprises a first electronic paper directly coupled to the interface, a third electronic paper directly coupled to the interface, and a second electronic paper indirectly coupled to the interface through the first electronic paper and the third electronic paper; and wherein the controller is further configured to: determine a coupling order of coupling the first electronic paper, the second electronic paper, and the third electronic paper to the interface based on the ID information; control an electronic paper determined from among the plurality of electronic papers (200-N) to display a contents list and an electronic papers list, wherein the electronic papers list indicates the plurality of electronic papers (200-N) according to the determined coupling order; receive a selection of a content included in the contents list and an electronic paper included in the electronic papers list; and transmit the selected content to the selected electronic paper. determine a coupling order of coupling the first electronic paper, the second electronic paper, and the third electronic paper to the interface based on the ID information; control an electronic paper determined from among the plurality of electronic papers (200-N) to display a contents list and an electronic papers list, wherein the electronic papers list indicates the plurality of electronic papers (200-N) according to the determined coupling order; receive a selection of a content included in the contents list and an electronic paper included in the electronic papers list; and transmit the selected content to the selected electronic paper.