This study assessed lecturers' perceptions of postgraduate students' academic motivation and emotions in South-west, Nigeria. The researchers employed descriptive survey research design for the study. The population of the study comprised all university lecturers in South-west, Nigeria while the target population consisted of all lecturers taking postgraduate studies in Federal Universities across South-west, Nigeria. The study sample consisted of 100 respondents purposively selected from five Federal Universities (University of Lagos, University of Ibadan, Federal University of Agriculture, Abeokuta, Federal University of Technology, Akure and Obafemi Awolowo University) in South-west. Lecturers' Perception of Postgraduate Students Academic Motivation and Emotions Questionnaire of 4-point Likert type, developed by the researchers with Cronbach Alpha reliability coefficient value of 0.83 was used for data collection. The data collected were analysed using frequency, percentages and multivariate analysis of variance. The findings showed that the perceived academic motivation of postgraduate students was average and emotion towards academic activities was stable. Also, the study showed a non-significant difference in male and female lecturers' perception of postgraduate students' academic motivation and emotion. It was, therefore, recommended that academic activities at the postgraduate level should be such that will raise the motivation level and stabilize the emotion of the students.