Drawing upon social learning theory, this study discusses entrepreneurial learning by including personal, social, and environmental factors as drivers of entrepreneurial learning and simultaneously exploring their mediator and moderator. Empirical tests are conducted using the data of graduate students in Taiwan. The test results show (1) entrepreneurial optimism, relational support, and environmental friendliness are positively and indirectly related to entrepreneurial learning through the mediation of entrepreneurial engagement; (2) the relationship between entrepreneurial optimism and entrepreneurial engagement is positively moderated by problem-solving efficacy; and (3) the relationship between environmental friendliness and entrepreneurial engagement is negatively moderated by problem-solving efficacy.