Trustworthiness especially for service oriented system is very important topic now-a-days in IT field of the whole world. There are many successful E-commerce organizations presently run in the whole world, but e-commerce has not reached its full potential. The main reason behind this is lack of trust of people in e-commerce. Again, proper models are still absent for calculating trust of different e-commerce organizations. Most of the present trust models are subjective and have failed to account vagueness and ambiguity of different domain.