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This is a system of innovation – decision process, which an individual (or other decision – making unit) passes : (1) From first knowledge of an innovation, (2) to forming an attitude toward the innovation, (3) to a decision to adopt or reject , (4) to implementation of the new idea, and (5) to confirmation of this decision. Diffusion scholars have long recognized that an individual`s decision about an innovation is not an instantaneous act. Rather it is a process that occurs over times, and the role of different communication channels and information sources at different stages of the innovation – decision process, was provided by the other research scholars. The main objective of this research was determining a model to cognition of the role of different communication channels and information sources at different stages of innovation – decision process over adoption of echo-sounder technology at the point of view of captains of fishing boats in Boushehr province of Iran. To study, a sample of 135 captains were selected, using “Proportional Random Sampling” method. Data were collected by filling out the questionnaires, that had been tested before. The criterion like frequencies in terms of number, percentage, mean, mode and standard deviation were calculated. Also, factor analysis was used for the analysis of data. By the use of factor analysis model, communication channels and information sources classified into five categories like, local non-profit channels and sources, local profit channels and sources, provincial cosmopolite channels and sources, ultra-provincial cosmopolite channels and sources, and cosmopolite A.V. channels in respect of effectiveness of communication channels and information sources .