In the wake of the completion of model species' whole genome sequencing,genomics have been improved from the structural-genomics area to the functional-genomics area.Being a forward science,genomics shows a highest activities and influences.Based on the achievements of structural genomics,all subjects in functional genomics have different principles,key technologies with characteristics and superiorities,and thus have special spheres of application and developmental trends.Functional genomics is giving rise to the born of diverse aimed new-sciences because of its integration with many aspects of modern sciences.