The invention discloses a 
power grid equipment state information 
cloud storage system which comprises a plurality of computers and a 
cloud storage server cluster, wherein the computers are connected through 
the Internet and are arranged in all 
transformer substations to serve as 
client equipment, the 
cloud storage server cluster is arranged at an intelligent 
power grid center to serve as cloud storage end equipment, and all the computers are connected with 
fingerprint identification instruments. The invention further discloses a data uploading method of the 
power grid equipment state information 
cloud storage system. The uploading method includes the steps of (1) user registration, (2) file selection, (3) 
file transmission, (4) file receiving, (5) file 
encryption and (6) 
file storage. The invention further discloses a data downloading method of the power grid 
equipment state information 
cloud storage system. The downloading method includes the steps of (1) user certification, (2) file selection, (3) threshold restricting, (4) file decryption, (5) 
file transmission and (6) file receiving. By means of the power grid equipment state information 
cloud storage system and the data uploading and downloading methods of the power grid equipment state information cloud storage 
system, power grid information safety is improved, the integrity of the downloaded files is guaranteed, and the 
utilization rate of power grid information is increased.