The embodiment of the invention provides a node control method and device, a version control method and device and a distributed system. The node control method is applied to a distributed system. Thedistributed system comprises a working node capable of providing service, the node control method comprises the following steps of: acquiring version information of each working node, acquiring a legal version information list which comprises one or more pieces of version information of the working nodes which are allowed to provide service, and determining whether to allow the working nodes to provide service or not according to the acquired version information of the working nodes and the legal version information list.