In deciding which IoT technologies should be introduced in the maritime industry, it is important to quantitatively compare their diverse functions. In this research, an evaluation method using a parametric ship operation simulator is proposed. The simulator consists of three models, shipping, loading and docking, with the shipper's QCD (safety, economy and delivery reliability) as evaluation criteria. The effect of introducing IoT technologies is evaluated by changing input parameter value. As a case study, evaluation of various kinds of actual IoT technologies was conducted. The Result showed that the proposed method can quantitatively compare each IoT technology considering technology's maturity levels.