Abstract
The development of superconductivity from its discovery in 1911 and the current situations of the technology are presented, including superconducting materials, superconducting wires, superconducting cables and superconducting equipment. We focus on superconducting cables. Introduces the history course and achievement of superconductor research, especially the high temperature superconductor research. We analyse problem and point out the orientation of high temperature superconductor research. Superconductive applications outlook both practical and potential seem good, especially, such as energy resource, electric force, microwave telecommunication, computer, medical cave and various doctors, etc.
Key words：superconductivity; Kamerlingh Onnes; High-temperature superconductor
