As the essential component of metacognition, metacognitive monitoring refers to people’s ability to know and control their own mental functioning. It is a kind of psychological action which possess deep implicit, which composed of monitoring processes and control processes. Many methods for the assessment of metacognition monitoring have their pros and cons. At present, on-line methods appear to be much suited to measure it, but it is difficult to design the task. Master Mind game has been extensively used in psychological and educational research. The present study aimed to analyse the usefulness of different kinds of Master Mind game and obtain valid scores that adequately reflected metacognitive monitoring. Using multi-method designs such as interview, a dynamic assessment format of Master Mind game was developed in order to investigate metacognitive monitoring. Thirty four university students participated in the study. First, participants were asked to complete Raven’s Progressive Matrices, and then they were required to complete four groups of Master mind game in possible moves. The four groups game were different from numbers of colors （choose three colors from five colors possible, choose four colors from six colors possible ) and whether required to put them in right order four from corrected place. After each attempt, feedback was give to inform participants of how many colors were correct and how many were placed in the correct location. Interview followed every group of game. The results showed that：（1）Only when the task was rather difficult and strategies were searched, metacognitive monitoring can be triggered, such as in Game 4 (choose four colors from six colors possible, and put them in right order )；(2) As for metacognitive monitoring indexes recorded on computer, the proportion of feedback time represented university students’ metacognitive monitoring level, while the frequency of violation of feedback well reflected college students’ metacognitive control level. At present, multi-method designs is scarcely available in the literature on metacognitive monitoring. The use of Master Mind which provides valid and reliable assessment is a meaningful attempt.