The present invention provides 2,4,7-trisubstituted fluorene compounds and electronic devices thereof. The 2,4,7-trisubstituted fluorene compound of the present invention has excellent film-forming property and thermal stability by introducing a fluorene-based rigid structure, and can be used for preparing organic electroluminescence devices, organic field effect transistors and organic solar cells. In addition, the 2,4,7-trisubstituted fluorene-based compound of the present invention can be used as a constituent material of a hole injection layer, a hole transport layer, a light emitting layer, an electron blocking layer, a hole blocking layer or an electron transport layer, and can reduce driving voltage, improve efficiency, brightness and life, etc. The preparation method of the 2,4,7-trisubstituted fluorene compound of the present invention is simple, the raw materials are easily obtained, and the development requirements of industrialization can be met.