This disclosure relates to a method for preparing vertically grown nanostructures of C60 and conjugated molecules, including: forming a C60 film or a conjugated organic molecular film; and introducing the C60 film or conjugated organic molecular film and a solvent into an airtight container, and then conducting solvent vapor annealing. According to the preparation method, C60 molecules and conjugated molecules may be vertically grown under mild conditions by a simple process.