Method for judging equipment connection state and equipment type

The invention discloses a method for judging an equipment connection state and an equipment type. The method is implemented through one processing unit and comprises the following steps that: (A) independently transmitting a plurality of inquiry requests to a plurality of addresses of an integrated circuit bus to confirm whether each address is connected with any one piece of equipment or not; and(B) when the reply message of at least one piece of equipment correspondingly connected to the addresses is received, according to one lookup table, comparing at least one address corresponding to the reply message of at least one piece of equipment with the corresponding equipment type so as to compare the equipment type of at least one piece of equipment corresponding to at least one address, wherein the lookup table comprises a plurality of equipment types which independently correspond to a plurality of address sets formed by at least one reference address. 种判定设备连接状态及设备类型的方法，通过处理单元来实施并包含以下步骤：(A)分别传送多个询问请求至集成电路总线之