As English is a global language, it is important for students to learn it effectively and efficiently. Learning English from English cram schools is very popular in Taiwan. Most students have studied in English cram schools for some period of time of their English learning experience. The present study concerns about how English cram school learners’ English learning attitudes related to their learning motivation and learning well-being in Taiwan. By using the quantitative research methodology, an empirical research model has been proposed and 277 valid questionnaires were collected. The research results show that learning motivation has a significant impact on learning attitude and learning well-being. Then, the English learning attitude provides mediated effects between learning motivation and well-being. Learning attitude is the key to English learning well-being. Furthermore, a participant’s gender has a significant moderating effect between learning intrinsic motivation and attitude. According to research findings, some suggestions such as using e-learning tools were provided for teachers and educators of the cram schools in Taiwan.