Abstract: A model was developed and used to choose the best planting date of a banana field in order to optimize the total income. The model takes into account seasonal variation of the selling price of banana and banana bunch weight. The study was carried out in West of Hainan Island for once harvest per year field management strategies. The total income was outputted with input temperature per weeks only. The results of simulations showed that the optimal planting month is 22-25th weeks of a year and enables a 40% increase in income over other weeks. This approach is a first step towards economic estimation climate change on banana planting using system dynamics model.