Quantum mechanics is a field of physics that became important from the late 19th century to the start of the 20th century and its non-relativistic part seemed to be completed by von Neumann in 1932. However, the EPR paradox by Einstein, Podolsky and Rosen pointed out a strange feature of quantum mechanics known as quantum entanglement, which represented that people are unable to consider the existence of global states of composite system as a product of the states of separate subsystems. The phenomenon promotes to a further study of quantum and a new faster way of communication. The article introduces the discovery and the early research of the quantum entanglement, how the theory about the quantum entanglement was corrected, the fabrication of the entangled particles, and the application of the quantum entanglements phenomena to the quantum communication. The research aims to discuss the importance of the study of the quantum entanglement at current stage
