In the past two decades, demand for food products, fresh and ready for consumption and free of preservatives and additives with high nutritive value is increased. Strawberry is one of the most delicious fruits in different regions of the world due to climatic variation and possible greenhouse cultivation is the ability to produce in all seasons. Strawberries and its presence in the consumer food basket for the supply of vitamins, especially vitamin C is a valuable resource. The presence of antioxidants including Ellajic acid in the fruit and role of these foods in the prevention of dangerous diseases such as cancer, consumption of this fruit's value has multiplied. Strawberries are also rich source of pectin. Soft fruits such as strawberries, a short time after picking which this condition infection by gray mold ( Botryotinia ). Among the most effective methods to achieve quality and extend shelf life, modified atmosphere packaging is used. In this study, then disinfect with a solution of chlorine, for inoculation, 20 ml of the suspension contains (1/94 × 10 5 ) conidi/ml of the Botrytis cinerea was placed on the surface of fruits and modified atmosphere packaging system with two gas combination normal air and high oxygen (80% oxygen and 20% nitrogen) was used. About 200 gr of inoculated strawberries place into three types film(LDPE, PA and BOPP. Air Packages were tested at intervals of three days and high oxygen packages were tested at intervals of seven days.During storage, qualitative characteristics such as color, Titratable acidity, Total soluble solids, texture, pH, electrical conductivity, weight Loss, sensory evaluation, microbial counts ( Botrytis cinerea ) and gas composition were evaluated. Statistical analysis the results of the evaluation the quality of strawberry showed The effect of the film and the gas composition on weight loss, total soluble solids, microbial evaluation ( Botrytis cinerea ) and the effect of storage time on all quality characteristics, was significant. On the other hand, aims at predicting the quality characteristics during storage, a mathematical model to describe the kinetics characteristics of qualitative changes, was developed. High correlation between the measured values and the values predicted by the model showed that the developed model can predict well the changes in quality characteristics during storage. The results showed that high oxygen systems, compared to typical air and films with fewer Permeability have more efficiency in maintaining the quality and increase the shelf life of strawberries