This paper presents the Wi-Fi phone with RFID (Radio frequency identification) of student entered the school, via Wireless Access Points (APs) of school will transmit MAC address with RFID of Wi-Fi phone to Internet Data Center (IDC) for server and then the message exchanged by using GSM (or 3G) has been transmitted message (or mail) to the mobile user of parents (or client user). The wireless access points support broadcasting multiple SSIDs, each of which can have a different set of security and network setting. The RADIUS server is used to authenticate the Wireless Access Point (AP) and mobile nodes. In safety case system, we used the several authentication and encryption options for the WLAN. We will discuss the use of Wi-Fi protected Access (WPA), RFID, IP Security (IPSec), and Secure Socket Layer (SSL), and there are high Quality of service (QoS) and performance.