An ultrasound image detection method includes emitting a plurality of first plane waves simultaneously, receiving at least one first reflection wave reflected from the plurality of first plane waves by an object, emitting a plurality of second plane waves simultaneously according to the at least one first reflection wave, receiving at least one second reflection wave reflected from the plurality of second plane waves by the object, detecting an angle or a position of the object by using a plurality of decision plane waves according to the at least one second reflection wave. Two adjacent first plane waves form a first angle. Two adjacent second plane waves form a second angle. The first angle is larger than the second angle.超音波影像偵測方法包含同時發射複數個第一平面波;接收該些第一平面波被物體所反射的至少一個第一反射波;依據至少一個第一反射波,同時發射複數個第二平面波;接收該些第二平面波被物體所反射的至少一個第二反射波;及依據至少一個第二反射波,利用複數個決策平面波以決定物體的角度或位置。兩相鄰第一平面波夾第一角度,兩相鄰第二平面波夾第二角度,第一角度大於第二角度。100‧‧‧超音波探測系統10‧‧‧超音波探頭11‧‧‧表面Obj‧‧‧物體BFW1至BFWN‧‧‧平面波θ1至θ3‧‧‧夾角
