Senior hockey in Hradec Kralove dates back to 1925, with one season in the top flight for HC Královští lvi Hradec Králové in 1993/1994. Mountfield HK made their Extraliga debut in 2012/13, after Mountfield, who owned the license to compete in the league, moved the team from České Budějovice and merged them with Královští lvi.

Since the move to Hradec Králové, the team has gained the hearts of many fans in the region and built up an Eastern-Bohemian rivalry with Dynamo Pardubice, as the cities are just 19 km apart from each other.

After three straight seasons ending in quarter-final losses in the Czech Extraliga, Mountfield got through to the semi-finals in both 2017 and 2018. They finished top of the Czech Extraliga regular season in 2021/22 and made the playoffs finals the following season. 

The team has taken part in the CHL four times and in 2019/20, Mountfield HK made it all the way to the CHL Final and hosted the event in the Czech Republic for the very first time. They lost the Final to Frölunda Gothenburg 1-3.