|This study is mainly aimed to the comparison and verify of different background variables of Southern Taiwan Red Cross lifeguards, which included social support, participation motivation, possible barrier factors as well as involvement odds. The subjects in this study are mainly life guards in Southern Taiwan. It was given 220 surveys in total. Retrieve up to 97.2% (214) as effective surveys. The result of the surveys after analyzed showed 1. Most of the Red Cross lifeguard training and water safety lifeguard are males aged between 18-30. However participants who get licenses over five years were about 57.5% and 58.9% of them were licensed coaches. 2. It showed not much difference in the gender of life guards, level of education, social support, participation motivation, possible barrier factors as well as in involvement odds. How ever “age” in possible barrier factors do show great differences. Marriage status do affect time of getting the license, motivation of participation and level of involvement. Level of license do affect in the social support and level of involvement as well as in level of participation. 3. Social support do affect motivation of participation, level of participation, positively. How ever social support do not affect barrier factors. Above all it provided reference to the water safety and life guards training. It gives the organization to understand better of life guards in social support, motivation of participation as well as level of participation of any later and further research.