does Arduino supports many sensors
Well not exactly support but it can be connected to many sensors in many ways.
Perhaps the easiest way to expand the arduino from the basic number of I/Os (input / outputs) is to use the I2C bus. This can support up to 127 devices that could be sensors, or could be port expanders, that is give you more I/Os.
The 1 wire bus is useful for long runs, that is sensors a long way from the arduino. These are mainly temperature sensors.
For high speed connections use the SPI bus.