The purpose of this paper is to evaluate the external cost of cellular base stations by the contingent valuation method. We randomly sample 501 residents in Chiayi city in Taiwan and survey the willingness-to-pay of removing nearby cellular base stations by a face-to-face interview. A double-bound dichotomous choice model is employed in our study. Our results show that on average the WTP of removing cellular base stations for each person is about NT$ 2932. Moreover, the degree of suffering from the base station also depends on the level of education, frequencies of using a cellular phone, risk perception, and habit of exercise of individuals.