In the business world, English language is considered as an important language for communication among people. According to the Act of Thai Education during B.E. (2008-2015:39), the sustainable development for Thai people has become the main focus in this era. To transform the education especially in the 21st century is needed to be integrated the new methodology in language teaching into three main areas. They are: education development, education extension and cooperation in services and educational management. The objectives of the study were: 1) to develop learning activities in and outside classroom context by using B-SLIM Model with the University students in Thailand 2) to compare the results of learning with the B-SLIM Model in the course of listening and speaking in Business English II after using B-SLIM Model 3) to investigate the level of listening and speaking of students following B-SLIM Model. The conceptual framework applied in the study was the development of Listening and Speaking skills by using B-SLIM Model as a teaching model in the course of Listening and Speaking in Business English II The qualitative method was mainly used, combined with the quantitative data collected from 27 students studying at Chandrakasem Rajabhat University and registering in the course of BENG 1102 Listening and Speaking in Business English II. The normal classes of Listening and Speaking course II in and outside university campus such as Suvarnnabhumi International Airport was a place of data collection. In addition, B-SLIM Model (Bilash's Second Language Instructional Method) was applied and used in creating the criteria for data analysis by means of experimental step and teaching step by step according to B-SLIM Model. The method of data analysis was the use of basic statistics.