Three-dimensional bicycle garage and bicycle storing and extracting method

The invention discloses a three-dimensional bicycle garage. The three-dimensional bicycle garage comprises a supporting substrate, a bicycle storing railway, a conveying railway, an entrance railway,a bicycle traction device, a transition railway, a first driving device, a bicycle storing and extracting device and a controller; the bicycle storing railway is fixed with the supporting substrate and is provided with first storing and extracting openings in the spiral direction of the bicycle storing railway; the conveying railway is spiral and is provided with second storing and extracting openings in the spiral direction of the conveying railway; the entrance railway communicates with each of the bicycle storing railway and the conveying railway; the bicycle traction device is used for pulling a bicycle storing plate in the entrance railway into the bicycle storing railway or the conveying railway; the transition railway is connected between the bicycle storing railway and the conveying railway; a bicycle scan