Apparatus and method for receiving signal in multiple input multiple output system

A receiving device and a method of a multiple input multi-output system for saving a chip price and power consumption are provided to reduce the number of RF chains implemented in MIMO RFIC(Radio Frequency Integrated Circuit). A clock generating and delay compensating unit(211) provides and generates clock. An antenna switching part(204) switches signal received through the multiple antenna according to clock. The antenna switching part separates the signal which is switched. An RF(Radio Frequency) chain shares the RF chain about signals separated on time. The RF chain converts signals into the baseband signal. An ADC(210) shares ADC(Analog to Digital Converter) about the transformed signals. The ADC converts signals into the digital signal. The ADC outputs the transformed signal according to clock.