I have a machine(Machine Name A) where QV server and publisher is installed.
Now I want to install publisher in other machine(Machine B) and keep QV server as it is in Machine A and uninstall (If required) publisher from machine A.
I'm looking at a similar issue here and the 'Upgrade and Migration' document is exactly what the OP needs. Note that 'Migrate' does not mean from version 10 to 11, it means migrate the QDS service from Machine A to Machine B just as the OP requested.
The document also shows how to change the server name hosting the migrated QDS service using the correct approach in QMC rather than editing xml files which runs the risk of making mistakes in your editing.
