In order to investigate the growth and decay processes of ice in still water and the evolution of ice cover, a prototype experiment was carried out to study the ice regime in the Nanhu Pond in Tuoketuo County, in the Inner Mongolia Autonomous Region during the period from the middle of November 2014 to the middle of March 2015. The influence of air temperature in different periods and water depth on the growth and decay processes of ice in still water, the evolution of ice cover, water temperature distribution, and temperature at the ice surface were studied. The experimental results show that the air temperature was the main factor that influences the regime of ice in still water. The ice thickness was linearly correlated with the accumulated daily mean negative temperature during the growth period of the ice cover. The slope of the increasing of ice thickness and ice cover during the unstable and late melting periods was mainly affected by the air temperature. The water depth affected the greatest ice thickness and ice melting time, while its impact on the evolution of the ice cover was not significant. The water temperature in the surface layer was significantly influenced by the variation of the air temperature, while the deep layer was less influenced. The temperature at the ice surface showed a synchronized change with the air temperature.