This study aims to determine the effect of the learning model of problem-based concept acquisition on problem solving abilities and understanding of physics concepts of students of class XI MIA MAN 1 Mataram. This research is a quasi-experimental with a non-equivalent control group design. The subjects of this study were 37 XI MIA 1 students as experimental class and 38 MIA 2 XI students as control class. The experimental class given treatment problem-based concept learning model while the control class given treatment conventional learning. Description test is used to measure the students 'physical problem-solving abilities totaling 5 items and multiple choice tests to measure students' understanding of physics concepts by 10 items that have been tested for validity, reliability, distinguishing power and degree of difficulty. The research hypothesis was tested using the MANOVA test. The results of the hypothesis test showed a significance value of 0.00. Significant level used is 0.05, it can be said to be 0.00 <0.05, which means that H0 is rejected and Ha accepted, so can be concluded that there are significant acquisition of concept-based learning model on problem solving skills and understanding of physics concepts of students of class XI MIA MAN 1 Mataram.