Provided are a bracelet-type universal screwdriver and an operation method. A screwdriver of a single specification is good in stability but narrow in application range, one screwdriver can only screwand unscrew screws of one specification, a user needs screwdrivers of various sizes in order to screw and unscrew screws of various specifications, and it is inconvenient for the user to use, carry and keep the screwdrivers. Although a screwdriver with replaceable driver heads can screw and unscrew the screws of various specification, the screwdriver is poor in stability, and the multiple driverheads are not convenient to carry and prone to being lost. The bracelet-type universal screwdriver is of a ring structure formed by a set of driver head chains (1) and a set of handle locking chains (2), wherein each handle locking chain is arranged between every two adjacent driver head chains and connected with the driver head chains through pins (6).