The strategy, which will run from 2025 to 2035, was approved during a full council meeting on December 5.
The plan sees libraries across the county split into three tiers.
Tier one libraries will serve major towns and offer services for at least six days a week with paid staff.
Tier two libraries have paid staff, serve smaller towns and will be open for at least four days a week while tier three libraries will provide a core book loan service, are small and can be co-located in another building.
Both Eastwood and Kimberley will be classed as tier two libraries while Selston and Jacksdale will both be in tier three.
The council passed the running and operation of libraries to the organisation Inspire in 2016.
The organisation’s role is to maintain service levels while reducing the council’s costs, securing investment and improving facilities.
Its contract will expire in 2026 with a proposed extension until 2028.
While discussing the new strategy, Coun Scott Carlton (Con), portfolio holder for communities and public health, said: “This administration will not close libraries and I stand by that guarantee.”
Over the past decade, the council has invested more than £30m into library buildings and technology to modernise and enhancing the services.
The new strategy includes a 12-point action plan to enhance library services such as using technology, investment into buildings, and increased staff training.
Broxtowe councillor Steve Carr (Ind) acknowledged a cross-party effort in the retaining of the library network during difficult circumstances.
He said: “One of the reasons our libraries are in such a good place is because of the agreement across the floor here.”
But Coun Tom Hollis (Ash Ind) expressed his concern for the discrepancy in services offered by the different tiers, highlighting that in his area of Huthwaite, the library would now only be open for 12 hours a week.
He said: "What continuing a tiered service shows is this council has absolutely no intention of improving the services and opening hours in the second and third tier libraries.”
Coun Penny Gowland (Lab) asked if the strategy could be amended to enable tier three libraries to engage in public health messages.
She said: “The tier one and two libraries have an active role in public health, the tier three ones seem quite a passive role.
"I ask to try and make a more active engagement for public health in tier three libraries – its a key location where the council actually reaches the community.”
Coun Bruce Laughton (Con), said: “I’ve got three libraries, every single one of those parish councils, the libraries have been under political attack, people saying they were going to close, sacking staff, and scaremongering – that is completely wrong.”
Coun David Martin (Ash Ind), who represents Selston responded by saying: “All of my libraries closed, they all got moved into different buildings, they all had employees and now they’re all run by volunteers – it works.
Councillors voted unanimously to approve the updated library strategy.