The purpose of this dissertation is to study the life and thought of Hannah Whitall Smith, a female layperson who led evangelical Holiness movement and feminist social movements in the United States and Britain in the late 19th century. She was the author of The Secret of Christian happy life, one of the most inspirational Christian classics, and the actual founder of the Keswick Convention which is an outstanding annual gathering of evangelical Christians in England with global influence. She was also a first generation feminist who actively campaigned for feminist social movement as a major leader of Women's Christian Temperance Union. Her indomitable life that has constantly overcome repeated hardships and remarkable teaching of evangelical holiness shed light on critical meaning and stance in modern church history.