A carbon dioxide recovery system according to the present embodiments includes: an absorber bringing exhaust gas containing carbon dioxide into contact with absorbent reversibly absorbing or releasing carbon dioxide at above or below a predetermined temperature, and making the absorbent absorb carbon dioxide in the exhaust gas; a regenerator releasing carbon dioxide in the absorbent by heating the absorbent absorbing carbon dioxide at the absorber; a reflux pipeline flowing back the absorbent regenerated at the regenerator to the absorber; and a filter introducing at least a part of the absorbent, removing solids accumulated in the introduced absorbent, and returning the absorbent after the solids are removed to a vicinity of a portion where the absorbent is introduced.