A four-level system in Eu3+Y2SiO5 crystal is obtained through coupling a hyperfine level with a radio-frequency field. The absorption properties of this four-level system driven by a radio-frequency field are investigated by means of density matrix equation of motion. It is shown that the two contrary quantum effects, electromagneticically induced transparency (EIT) and electromagnetically induced absorption (EIA) can be obtained in the absorption spectrum of the system due to the interaction of both optical coupling and radio-frequency fields. When radio-frequency field resonates with corresponding levels, EIT effect presents within two-peak area of Autler-Townes splitting caused by radio-frequency field. But nonresonant radio-frequency field can cause EIA. The positions of EIT and EIA are determined by the detuning of optical coupling field. The linewidth, position and conversion of EIT and EIA can be controlled by changing detuning, Rabi frequency of optical coupling and radio-frequency fields.