There are three main application scenarios in 5G: eMBB

mMTC and uRLLC. Different scenarios require different performance

and it needs to allocate network resources on demand

therefore 5G needs to be reconstructed by cloud. From the perspective of telecommunication operators

this paper first proposes a network infrastructure reconstruction scheme to realize hardware and software decoupling and basic resource management

then proposes a network function reconstruction scheme to realize 5G application functions

then puts forward a solution of operation reconstruction

enumerates 5G operation mode

network start mode

the network support capability

and the direction of personnel transformation with examples. This paper provides cloud solutions for 5 G commerce.