Objective: Nursing process is standard to provide nursing services. This study has been designed and implemented with the aim of determining the effect of implementing nursing process using “accessible care cards” method on the satisfaction level of nurses, patients and inpatient children’s parents of the care style in hospital. Methodology: This study is a semi-empirical intervention research. Sample size among nurses was equal to 38 people, which was fixed before and after the project implementation. The sample size of patients in control group was equal to 38 people and 66 people in case group consisting of parents of impatient children and adult patients of Pediatric intensive care unit and special unit in Golestan Hospital of Ahwaz selected using random sampling. Implementation of project was done by nurses using the form of “patient identification” and the form of “care cards”. Data collection instrument in this study is questionnaire of satisfaction of nurses, patients and parents of impatient children of care style, which was fulfilled before and after implementation of the project by samples individuals. The data analysis was done using SPSS-19 software. Results: The satisfaction level of nurses was equal to 20.79 before intervention and was equal to 25.05 after the intervention and the values showed significant statistical difference (p<0.001). for the case group, 98.5% of patients and parents of impatient children and in the control group, 28.9% of the individuals claimed that the care style in the hospital is excellent. Statistical test showed significant difference (p=0.001). Conclusion: Implementation of nursing process using “accessible care cards” method could affect increase in satisfaction of nurses, patients and parents of impatient children of the care style in the hospital and on better implementation of nursing process.