The invention relates to a method for preparing a flexible and transparent conductive graphene membrane, belongs to the field of the science and technology of nanometer photoelectric materials and particularly relates to the preparation of a thermal reduction and oxidation graphene membrane at the temperature of 1,000 DEG C and technology for transferring the membrane onto a flexible substrate. The flexible and transparent conductive graphene membrane provided by the invention has the advantages of high electrical conductivity, high transmission of light, large-area preparation, rich raw materials, high material utilization ratio, simple preparation method, environmental protection and the like. The technology overcomes the defects of easy brittleness of the conventional indium tin oxide (ITO) and poor electrical conductivity of the conventional flexible conductive polymer membrane, is hopeful to prepare a novel flexible and transparent conductive membrane, is potentially applied to photoelectric functional apparatuses such as organic electroluminescent displays, organic electrical storages, organic solar cells and the like and is particularly applied to flexible photoelectric apparatuses.