The importance of a Mars surface network mission has long been emphasized since it can provide unique measurements from globally distributed landers. To date, however, no surface network has been deployed to Mars despite the expected scientific promises. One of the challenges in the mission is to establish an optimized thermal design that survives in the extreme thermal environments and low insolation especially observed at high latitudes in winter. In this talk, I will present the conceptual thermal design of the miniaturized Mars network mission, neoPASCAL, and discuss the feasibility of the design and the scientific capabilities.