The objective of the home security detection and appliance control system is to protect occupants against events -- many of which are attributable to human error. We have developed a module based security system for home automation. The structure of the security system is divided into many modules. Each module in the home -- automation security system we develop has a wireless RF and a speech interface. They contain fire detection module, intruder detection module, environment detection module, gas detection module, (AC) power detection and diagnosis module, appliance control module and team robots. In the security detection module, we use multisensor fusion algorithms to decide an exact output. In the application control module, we use two-wire communication via wireless RF interface. These modules have event-condition voice alarms, and send the real-time status to the master controller. In the smart team robot system, we have designed many smart robots for the security system. We have designed a general user interface (GUI) for the intelligent security system. The user interface can supervise these modules and team robots via wireless RF interface, and use wireless Internet and mobile phone for remote supervision.