A wireless power transmission system, including a wireless power repeater, a power supply apparatus and a wireless power transmitter, wherein the repeater is configured to repeat power between the wireless power transmitter and an electronic device, wherein the wireless power repeater comprises: a controller; a charging container having a bottom and at least two sides, wherein the charging container has a form for receiving the electronic device; and a repeating coil (521, 522, 523) placed at least at one side of the charging container to repeat the power between the wireless power transmitter and the electronic device by using resonance, wherein the charging container has a hexahedral shape, wherein the repeating coil (521, 522, 523) includes a first repeating coil, a second repeating coil, and a third repeating coil, characterized in that the first to third repeating coils (521, 522, 523) comprise a conduction line wound repeatedly to have a spiral form, wherein the first repeating coil is disposed at the bottom of the container to repeat the power between the wireless power transmitter and the electronic device, wherein the second and third repeating coils (522, 523) are respectively disposed at the at least two sides of the charging container to repeat the power between the wireless power transmitter and the electronic device, wherein the bottom and the two sides of the charging container are arranged at an angle of 90 degrees each other, wherein the controller is configured to control current to flow through the first to third repeating coils (521, 522, 523) at predetermined time intervals, wherein the controller is configured to generate a magnetic field by alternately sequentially applying current to the first to third repeating coils (521, 522, 523) at the predetermined time intervals. a controller; a charging container having a bottom and at least two sides, wherein the charging container has a form for receiving the electronic device; and a repeating coil (521, 522, 523) placed at least at one side of the charging container to repeat the power between the wireless power transmitter and the electronic device by using resonance, wherein the charging container has a hexahedral shape, wherein the repeating coil (521, 522, 523) includes a first repeating coil, a second repeating coil, and a third repeating coil, characterized in that the first to third repeating coils (521, 522, 523) comprise a conduction line wound repeatedly to have a spiral form, wherein the first repeating coil is disposed at the bottom of the container to repeat the power between the wireless power transmitter and the electronic device, wherein the second and third repeating coils (522, 523) are respectively disposed at the at least two sides of the charging container to repeat the power between the wireless power transmitter and the electronic device, wherein the bottom and the two sides of the charging container are arranged at an angle of 90 degrees each other, wherein the controller is configured to control current to flow through the first to third repeating coils (521, 522, 523) at predetermined time intervals, wherein the controller is configured to generate a magnetic field by alternately sequentially applying current to the first to third repeating coils (521, 522, 523) at the predetermined time intervals.