1. A wireless input system based on an intra-body communication wherein the system comprises a storage medium for storing program instructions thereon and a processor connected to the storage medium for executing the program instructions, comprising an intelligent wearable device wherein the wireless input system based on the intra-body communication further comprises a wireless keyboard coupled to the intelligent wearable device by a wireless manner to receive an input information, wherein the wireless keyboard comprises an intra-body communication unit of a transmitting terminal and the intelligent wearable device comprises an intra-body communication unit of a receiving terminal so that the wireless keyboard communicates with the intelligent wearable device therebetween via a human body to perform a wireless input procedure, and wherein the intra-body communication unit of the transmitting terminal is disposed in a press-button position of the wireless keyboard to directly contact a typing finger of a user, and the intra-body communication unit of the receiving terminal is disposed in the intelligent wearable device to directly contact a skin surface of the human body of the user; the wireless keyboard further comprising a control unit of the transmitting terminal and a storage unit; wherein the control unit of the transmitting terminal coupled to the intra-body communication unit of the transmitting terminal and configured to cause the processor to control operations of the units within the wireless keyboard; wherein the storage unit coupled to the control unit of the transmitting terminal stores a type information of the wireless keyboard and dynamically stores a keying code information, and the storage unit further comprises a keying code information storage unit for dynamically stores and records the keying code information; and the intelligent wearable device further comprising a control unit of the transmitting terminal and a display unit; wherein the control unit of the receiving terminal coupled to the intra-body communication unit of the receiving terminal and configured to cause the processor to control operations of the units within the intelligent wearable device; and wherein the display unit coupled to the control unit of the receiving terminal displays text messages on a screen of the intelligent wearable device.