This manuscript describes a series of our research based on the concept of an organic-inorganic molecular hybrid material. Homogeneous organic-inorganic hybridization is accomplished by mixing organic components and inorganic ones at a molecular level. Based on the strategy, a great number of hybrid materials have been synthesized and brand-new properties have been developed. Organic-inorganic hybrid materials insure the realization of the collaboration of organic features and inorganic features. We recently suggested a new concept of organicinorganic hybrid materials named 'element-blocks'. This concept provides the idea that an element-level design and combinations of the functional units can create innovative materials. Herein, we demonstrate synthetic methods and examples of the organic-inorganic hybrid materials, and we introduce our recent work based on the concept of element-blocks.