The purposes of this research were: 1) to develop lesson plans for STEM education for undergraduate students with the efficiency of the processing performances and the performance results (E1/E2) at the determining criteria as 75/75, 2) to compare emotional, attitude towards research, and classroom action research competency of undergraduate students before and after implementing STEM education. The sample was one class of the teaching profession program in Chemistry. The experimental group was selected by simple random sampling. The research instrument was lesson plans for STEM education management and practical skill development, a test of research knowledge, a research skill assessment form, an observation form, and a questionnaire. The statistics used were the percentage, mean, standard deviation, and Multivariate Paired Hotelling's T-Square. The research results showed that 1) the efficiency of the STEM lesson plans for undergraduate students' processing performances was 87.12 percent, and the performance results were 74.17 percent (87.12/74.17), meeting the set criteria of 75/75, 2) students had emotional, attitude towards research and classroom action research competency conduction after implementing the lesson plans of STEM education was significantly higher than before at the .05 level of statistics.