This book is the result of a study by the Vietnam Academy of Social Sciences in Dien Bien and Ha Giang provinces. The main content of the book consists of 5 chapters. Chapter 1: Overview of documents related to research issues and theoretical basis. Chapter 2: The situation of Protestantism from 2005 to present. Chapter 3: Social change of H'Mong and Dao Protestant from 2005 to present. Chapter 4: Cultural changes of H'Mong and Dao Protestants from 2005 to present. Chapter 5: Trends, factors affecting and affecting the cultural and social changes of H'Mong and Dao Protestants.