The study aimed to investigate Taiwanese nursing students' English learning behaviors and environmental factors relevant to English learning before and after their internships. More than five hundred nursing students from five junior colleges in southern Taiwan served as subjects of the study. The research instrument included a 134-item questionnaire dealing with students' personal demographic information and English learning behaviors of motivation, strategy, and anxiety. In addition, environmental factors relevant to English learning of English as the Medium of Instruction (EMI) and Internationalization at Home (IaH), as well as nursing English for practicum use were discussed. Findings revealed that some correlations among students' English learning behaviors, environmental factors, and English levels did exist before and after their internships. Moreover, students' internship experiences of English use also brought about some changes in their learning behaviors led to English levels. Some implications and suggestions were provided for schools and students hoping to equip students with good English skills before getting into the job market.