Clean intermittent catheterization (CIC) is one of the methods currently used to prevent overdistention of the bladder in patients with neurogenic bladder dysfunction (NBD). It is also helpful in preventing urinary tract infection and retaining the function of the bladder. Voiding diary and social behavior are necessary for the patients to maintain their physical and mental health, nevertheless there are currently no good assistant systems to help them achieve these goals. In this study, we propose a CIC assistant system with the functions of recording and tracking the voided volume and accessible lavatory. The aim of this study is to assess the effects from the 12 patients who joined the proposed system. Information collected from participants included their demographics, past medicals, injury characteristics, current and past bladder managements, and any NBD related complications. The results indicate that most patients felt relieved that they could know the voided volume and track their history easily. Moreover, the accessible lavatory function of the proposed system could reduce time consumption by 43.1% in finding the suitable lavatory, thus the desire and willingness of patients to travel increased from 25% to 75% after using the system. The proposed system could help doctors with clinical diagnoses, and help patients to understand more about the history of their catheterization volume and time period. This study provided essential information and design for future investigation.