An apparatus for detecting an object, characterized by comprising: a first sensor (101, 201) provided in a first region of an unmanned retail store, wherein the unmanned retail store has different regions comprising said first region and a second region, wherein the first region is a paying region, and the second region is a to-pay region; a second sensor (102, 202) provided in the second region and configured for collecting tags of target objects in the first region and the second region; a first processing unit (103, 203) configured to classify the tags of target objects collected by said second sensor, to obtain a first region tag cluster and a second region tag cluster, wherein said first region tag cluster comprises tags of target objects in said first region, and said second region tag cluster comprises tags of target objects in said second region, wherein said first sensor (101, 201) is configured to detect the tags of the target objects in said first region tag cluster based on a classification result of said first processing unit (103, 203) in order for a payment to be conducted, in the first region, for the target objects in said first region tag cluster, wherein the apparatus further comprises: a third sensor provided in a third region of the unmanned retail store and configured to collect tags of target objects in said third region, wherein said third region is an in-store region; a second processing unit configured to determine whether the target objects in said third region have moved based on the tags collected by said third sensor, wherein the second processing unit is further configured to perform a clustering on tags of target objects that have moved, and take a result of the clustering as auxiliary information, and wherein the first processing unit (103, 203) is further configured to filter the tags of the target objects in said first region based on the auxiliary information of the second processing unit, to obtain said first region tag cluster. a first sensor (101, 201) provided in a first region of an unmanned retail store, wherein the unmanned retail store has different regions comprising said first region and a second region, wherein the first region is a paying region, and the second region is a to-pay region; a second sensor (102, 202) provided in the second region and configured for collecting tags of target objects in the first region and the second region; a first processing unit (103, 203) configured to classify the tags of target objects collected by said second sensor, to obtain a first region tag cluster and a second region tag cluster, wherein said first region tag cluster comprises tags of target objects in said first region, and said second region tag cluster comprises tags of target objects in said second region, wherein said first sensor (101, 201) is configured to detect the tags of the target objects in said first region tag cluster based on a classification result of said first processing unit (103, 203) in order for a payment to be conducted, in the first region, for the target objects in said first region tag cluster, wherein the apparatus further comprises: a third sensor provided in a third region of the unmanned retail store and configured to collect tags of target objects in said third region, wherein said third region is an in-store region; a second processing unit configured to determine whether the target objects in said third region have moved based on the tags collected by said third sensor, wherein the second processing unit is further configured to perform a clustering on tags of target objects that have moved, and take a result of the clustering as auxiliary information, and wherein the first processing unit (103, 203) is further configured to filter the tags of the target objects in said first region based on the auxiliary information of the second processing unit, to obtain said first region tag cluster. a third sensor provided in a third region of the unmanned retail store and configured to collect tags of target objects in said third region, wherein said third region is an in-store region; a second processing unit configured to determine whether the target objects in said third region have moved based on the tags collected by said third sensor, wherein the second processing unit is further configured to perform a clustering on tags of target objects that have moved, and take a result of the clustering as auxiliary information, and wherein the first processing unit (103, 203) is further configured to filter the tags of the target objects in said first region based on the auxiliary information of the second processing unit, to obtain said first region tag cluster.