Cold sintering process is a green sintering technology developed in recent years, which can reduce the densification temperature of ceramics exponentially by the transient liquid phase and pressure introduced in the sintering process. Based on cold sintering technology, it can not only greatly reduce the energy consumption required in the ceramic preparation process, but also greatly expand the design of ceramic composites, creating new opportunities for the performance optimization and improvement of ceramic materials. Here the advantages of cold sintering technology can be demonstrated with two examples: microwave absorbing materials and thermoelectric materials. In the microwave absorbing material, we use cold sintering to introduce graphene oxide into the zinc oxide ceramic matrix, which retains the dielectric properties of graphene oxide to the greatest extent, and enhances the mechanical properties while improving the absorption performance of zinc oxide ceramics. For thermoelectric materials, we prepared a representative medium thermoelectric material PbTe at 300°C by cold sintering for the first time, which effectively inhibited the precipitation of Pb element. Its average ZT is even better than that of materials prepared by spark plasma sintering, which may encourage the application of this technology in the field of thermoelectrics.