Abstract：Molybdate material play in great important role in Photoelectric, catalysis, magnetic, mechanical field and have a significant relationship with size and Morphology. Study for quantitative?characteristics and regularity in growth process of nanomaterials is important subject to realized specifics controllable synthesis. But now the technology method is difficulties?to obtain the usually growth parameters to describe the nanomaterials growth process laws and features of instantaneous change dynamic information acquisition. In this paper we use microcalorimetric technique obtained the different morphology and size MnMoO4 in situ growth process thermal spectrum of single microemulsion systems, Combining with the FE - SEM technology to study the different reaction parameters corresponding the MnMoO4 nanomaterials shape size and the influence law of thermal dynamic behavior of in situ growth process. Further, basis of thermal dynamics equations to obtain the growth parameters and associated with morphology, clarifying the formation mechanism of nanometer materials, for the development of controllable growth of nanomaterials to provide powerful science basis.