The invention discloses an adjustable intelligent finger ring, which comprises a ring body and a ring setting, wherein the ring body comprises a left arc-shaped body and a right arc-shaped body; a nesting part is molded at the lower end of the left arc-shaped body; two rows of ball head plungers are screwed on the upper and lower sidewalls of the nesting part; a sleeve part, which is matched withthe nesting part, is molded at the lower end of the right arc-shaped body; a cavity part is molded in the middle of the sleeve part; two rows of inserting holes, which correspond to ball heads of thetwo rows of ball head plungers, are molded in the upper and lower sidewalls of the cavity part; an inserting groove is kept in the top surface of the ring setting; a round rotary seat is arranged in the inserting groove; a jewelry is screwed in the middle of the top surface of the rotary seat; an annular toothed ring is fixed to the sidewall of the rotary seat; a movable gear rack is connected tothe toothed ring in a meshed mode; a control main board is arranged in the ring setting; and a three-axis acceleration sensor and a Bluetooth module are arranged on the control main board. With the application of the adjustable intelligent finger ring, motion situations of a human body can be recorded, and the state of the jewelry can be flexibly adjusted; and the adjustable intelligent finger ring can adapt to fingers of different thicknesses.