The invention provides a multi-connection type air conditioner system, a locating method and device thereof and a readable storage medium. All indoor units and all outdoor units of the multi-connection type air conditioner system are in communication connection. The locating method comprises the steps that a processor enables all the indoor units and/or all the outdoor units belonging to the sameset of multi-connection type air conditioner system to send prompting messages according to an obtained locating order, and/or, the processor enables a monitoring device to send prompting messages indicating the positions of all the indoor units and/or all the outdoor units belonging to the same set of multi-connection type air conditioner system according to the obtained locating order. Through the provided locating method of the multi-connection type air conditioner system, the processor can respond to the obtained locating order, then a locating target and/or the monitoring device send/sends the prompting messages according to the locating order, a maintainer can find a target system fast conveniently, thus manpower is saved, and work efficiency is improved.