The book is a kind of proceedings of scientific workshop on the topic Catholic Life Style of Vietnamese Catholic Believers that held in Hanoi September 2009. The book compiled 27 selected discussion papers that delivered at the Workshop and is divided into 3 parts as follows: I - The formation & interaction between Vietnamese catholic believers & Vietnamese traditional & modern people. II - The issues of Catholic life style of Vietnamese catholic believers. III - Role & position of Vietnamese catholic believers. Here are some the most representative papers: 1 - Catholic life style of Vietnamese catholic believers: The concepts & development. 2 - Catholic life style: Interaction between a faith & national culture. 3 - Vietnamese catholic youth & catholic doctrine's teaching & educating at present. 4 - Some brief sketches regarding family style of Vietnamese catholic believers. 5 - Vietnamese catholic youth & parish's role. 6 - Vietnamese catholic believers & ancestral worship. 7 - Catholic life style on the context of Vietnam " catholic prohibition " in the XIX century. 8 - Understanding Vietnamese catholic believers' life style through Red River Delta villages' conventions. 9 - Human being life circle's ceremonies of catholic believers of the Bana ethnic minority in Vietnam Central Highlands. 10 - The church archaeology - new issue & new challenge. 11 - Vietnamese protestant believers life style.