A communication device comprising a power supply system, wherein the power supply system comprises: a MicroTCA Carrier Hub, MCH, (310, 610), a power module (330, 630), and at least one Advanced Mezzanine Card, AMC, module (340, 640, 650), wherein the AMC module (340, 640, 650) comprises a Module Management Controller, MMC, (341, 641, 651), a load circuit (342, 642, 652), and a load power supply enabling circuit (343, 643, 653); wherein, the MCH (310, 610) is adapted to send a load power supply control command to the MMC (341, 641, 651) according to a received load power supply control request from the MMC (341, 641, 651); the power module (330, 630) is adapted to receive an input of an external power supply, provide a management power supply to the MMC (341, 641, 651) through a management power bus after converting the input of the external power supply and provide a load power supply to the load power supply enabling circuit (343, 643, 653) through a load power bus after converting the input of the external power supply; the MMC (341, 641, 651) is adapted to obtain the management power supply from the power module (330, 630), and manage relevant circuit power-on work, send the load power supply control request to the MCH (310, 610), receive the load power supply control command sent by the MCH (310, 610), and send the load power enabling signal to the load power supply enabling circuit (343, 643, 653) according to the load power supply control command; and the load power supply enabling circuit (343, 643, 653) is adapted to obtain the load power supply, and control the load power supply provided by the power module (330, 630) to the load circuit (342, 642, 652) according to the load power enabling signal received from the MMC (341, 641,651). a MicroTCA Carrier Hub, MCH, (310, 610), a power module (330, 630), and at least one Advanced Mezzanine Card, AMC, module (340, 640, 650), wherein the AMC module (340, 640, 650) comprises a Module Management Controller, MMC, (341, 641, 651), a load circuit (342, 642, 652), and a load power supply enabling circuit (343, 643, 653); wherein, the MCH (310, 610) is adapted to send a load power supply control command to the MMC (341, 641, 651) according to a received load power supply control request from the MMC (341, 641, 651); the power module (330, 630) is adapted to receive an input of an external power supply, provide a management power supply to the MMC (341, 641, 651) through a management power bus after converting the input of the external power supply and provide a load power supply to the load power supply enabling circuit (343, 643, 653) through a load power bus after converting the input of the external power supply; the MMC (341, 641, 651) is adapted to obtain the management power supply from the power module (330, 630), and manage relevant circuit power-on work, send the load power supply control request to the MCH (310, 610), receive the load power supply control command sent by the MCH (310, 610), and send the load power enabling signal to the load power supply enabling circuit (343, 643, 653) according to the load power supply control command; and the load power supply enabling circuit (343, 643, 653) is adapted to obtain the load power supply, and control the load power supply provided by the power module (330, 630) to the load circuit (342, 642, 652) according to the load power enabling signal received from the MMC (341, 641,651).