Plant seed lings biotechnology is a high-tech knowledge-based industry which turns to be an important one. The study utilizes techniques of auditing, classifying, organizing plant seedling papers to understand the R&D capacity of plant seedlings industry. The outcome of the study can be referred to innovation and research foundation of the field. The study constructs a classification scheme of plant seedling detect technology which contains five technological categories, such as detection of pathogen, identification of variety, purification of variety, Seeds germination and detection of GMO. The outcome of this study also helps to understand the current development of plant seedling detection technology systematically.