1. Simple introduction: Azc208t small magnetic detector is integrated, all-solid-state and intelligent. With latest american technology, it has high resolution and accuracy, and can calibrate the surrounding interfered magnetic field. It is more advantageous in transportation and usage comparing with silicon oil liquid probe. The display is a powerful pda, which is touch screen with a stylus, you can write directly on it and then mark the measurement. 2. Working method: The working mode is to transmit the measured magnetic filed strength to pda through rs232 serial port line, then the pda will do data graphics processing and display the results of measurement and processing. Then we will judge and analyze the geological abnormality according to magnetic data variation supplied by azc208t magnetic detector. 3. Application: 1. It is used for magnetic exploration of various magnetic ores (magnetite), combined with other prospecting method, it can research oref+s buried depth, vein direction, continuity, and shape, size, ore deposit scale as well. 2. It is also used for magnetic prospecting and geological mapping of metal and non-metal ore deposits. 3. It is applied in faults location, archeology, hydrology, engineering exploration (pipe detect), seismic omen survey, volcano observation and magnetic prospecting &geological mapping of other environment and disaster geological work.