An assembled holder structure for positioning brain activity sensors includes plural sensor placement seats and at least one detachable strip. The sensor placement seats are disposed on plural brain regions. The detachable strips are configured to assemble the sensor placement seats. The sensor placement seats are configured to embed plural sensors respectively in an attempt to measure brain activity in the brain regions of interest.一種用於大腦活動感測器的拼砌式置放結構，包括多個感測器置放座體及至少一可拆式條帶，感測器置放座體分別對應地設置於多個大腦腦區位置上，至少一可拆式條帶分別接合於感測器置放座體之其中一者，從而使得感測器置放座體相互拼接。感測器置放座體可分別用以嵌入多個大腦活動感測器來對大腦腦區位置進行大腦訊號量測。
