Digital casual games have become an important game genre for the game industry. How to evaluate the enjoyment of digital causal games is an important research topic. This article integrates the current method for evaluating enjoyment of digital games and the four characteristics of casual games to develop the questionnaire for evaluating the enjoyment of digital casual games. The critical factors for the enjoyment of digital casual games are extracted. According to the 7 extracted enjoyment factors, whether these factors exist differences or not between players with different background, or between different genre of digital casual games are further analyzed.