I would like to know the best statistical analysis method used to analyse the contingent choice approach of evaluating the consumers preference and acceptance of fish product
Depends on the way your survey is constructed, on the number of variables used.
Typically, one first uses a scaling or clustering procedure to assess preference types and then a regression analyis as suggested by Hossein for causal analysis.
Have a look over the following overview over multivariate procedures - you will find futher refereces there.
The choice of analysis would depend on the variables and the theoretical relationships hypothesised within the research framework. Why regression would do the job as suggested from previous comments, SEM may be an option to exploit.