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; wherein the receiving and determining unit coupled to the control unit of the receiving terminal is configured to cause the processor to receive and analyze the keying code information and the keyboard type information issued by the wireless keyboard and determines whether the analyzed keyboard type information corresponds to the wireless keyboard clicked by the user.