The megasporogenesis, microsporogenesis and development of female and male gametophyte of Liriope spicata (Thunb.) Lour.were observed by the method of paraffin sections. The main results as follows: (1) the anther is four sporangiate and the development of anther wall is the basic type. The anther wall is composed of epidermis, endothecium, middle layer and tapetum. (2) The tapetum is of secretory type and the tapetal cells total breakdown at the time of pollen maturity. (3) The cytokinesis of the microspore mother cells in meiosis is of successive type. The microspore tetrads is isobilateral spore. The pollen grains are 3celled when shed. The ovary has three chamber which has two ovule that is double integuments, tenuinucellate and anatropous. The archesporial cell functions directly as the megaspore mother cell. (4) After meiosis the megasporocyte divides into linear or T type tetrads. The megaspore in chalazal end is functional one. The embryo sac is of a polygonum type. The wall of the microspore mother cells become thicker by the deposition of callose at the time of meiosis and the callose wall were degenerated at the time of microspores. This study enriched the content for research about the reproductive of Liliaceae, and provided the references to study the system evolution of Liliaceae.